I really don't get why you keep defending Bioware sry its ridiculous
Because there was way too many of them, some of them were OPTIONAL squadmates you could avoid and nearly all of them could be dead. I'm guessing thats why. Not that I'm happy with it, though.
That's defending them? I'm not going to lie and pretend they didn't at least try to make the story excuses for why the don't join you make sense in the narrative. That doesn't mean I'm defending it. Believe it or not I was disappointed that practically everyone from ME2 was excluded from your squad with Thane being the only one who even tried to contact Shepard during the lockdown. Seriously, some friends, right? Half of them don't even seem to be fully aware of Shepard's situation. Thane was the only one who tried to keep contact.
Just because I'm disappointed in it doesn't mean I can't acknowledge the fact that they present reasonable explanations for many of them. Like I said earlier the only one who doesn't have an explanation is Zaeed. While their excuses aren't all infallible the majority of them made sense to me and weren't unreasonable, imo. I'm not going to call all their excuses implausible nonsense just because I'm unhappy with the direction Bioware took. That wouldn't be fair, imo.
Liara doesn't fit the main story any more than other characters but because Bioware favoured her and liked her the most they made her important for the plot (she found the Crucible) its the way they wrote her
Actually, Shepard, Liara since the beginning of the trilogy has been the go-to "prothean expert" character. She's dedicated her life to researching them and unlocking their secrets. This was all a really big part of her character - did you play the first game by chance? Having her be one of the head researchers going through prothean archives to discover stuff about the reapers makes perfect sense in the narrative, its the role she was created to fill since the first game. Infact you first recruit her in the first game at a prothean research site.
If they had made it anyone else many people would had saw it as a wasted opportunity to introduce Liara back into the squad, imo. Similar to how some see Allers as a wasted potential since her role could had been filled by Emily Wong instead of introducing a brand new character to fit a role that could had already been filled by an already established character.
As for Bioware favoring her... maybe. Though if anything I'd see it as them making up for the fact that she is practically absent from all of ME2. I imagine a lot of Liaramancers (is that a term?) were upset about that little detail. Not only does she have little to no role in ME2 without the DLC but her personality has changed rather dramatically. So its kinda hard for me to take a "Bioware favors Liara" claim seriously when so many players felt she was cast aside in the second game.
And its the same with the lame excuses, its the way Bioware wrote them its not whats "best for them" as you keep saying and they wouldn't just waste time being on the Normandy because Shepard is doing the most to stop the war he is uniting the races and finding people for the Cruicble the Normandy is the best place if you want to help Shepard (as all the ME 2 squadmates would want to if Bioware didn't wrote them like they did in ME3)
I said 'waste time on the Normandy' because Shepard only takes two squadmates to any mission. I imagine there were a lot of squadies in ME2 you could say you 'ignored' for the most part. When I said 'best for them' I was referring more specifically to Wrex and Mordin, as I originally highlighted after initially saying it. I still stand by that assertion.
Think objectively about Wrex. What would be more useful to the reaper war effort. Having him leading and keeping the krogan inline and following orders... or just being another squadmate that shoots things alongside Shepard.
You really think he would be better off fighting with Shepard rather than essentially running Tuchunka? Hell, the only thing that keeps me from sabotaging the genophage cure is the fact that Wrex is the one in change.
What about Mordin? Objectively what role could he fill that best serves the reaper war effort? Doing what he is best at and working on the genophage cure... or just being another gun for Shepard? In ME2 I'll remind you he wasn't even recruited for his battlefield experience. He was recruited for his brilliant mind. He is a scientist, the best in his field. He can do far more good ensuring the genophage is cured which is absolutely VITAL to the war effort.
Mordin and Wrex can both fill roles that the great Commander Shepard never could. Shepard can't lead all the Krogan and keep them in-line. Well, not at that point anyway, lol. Shepard cannot cure the genophage. Shepard is a soldier, not a scientist. Wrex spent the past two years preparing for the role he now fills in ME3. Mordin spent many more years preparing for the role he now fills. They were made for these roles, they're integral parts of the story. To pretend that they don't fit these roles perfectly just because you would rather them be with you instead is just silly. This is why I say its 'best for them'.
1. Grunt could have easily joined Shepard his battlemaster if the Aralakh company was sacrificed and even if not he knows the stakes
I agree. Infact if you read my post you'd notice I basically said the same thing. I think it sucks that we can't bring Grunt back on board. I liked Grunt more than Wrex, so yeah, I was annoyed by it. He had a good excuse before you killed his squad, though. I thought it was nice that Grunt was growing up and now leading his own squad. Hell, I was proud of him. Infact if I had to choose between seeing Grunt leading a charge of krogan warriors in the final push for earth or having him headbutting things in my squad... I think I'd prefer to see him leading a charge. Sadly we get neither at the end so I digress.
2. Mordin could have joined the Squad for the Tuchanka missions it would make the most sense.
3. Legion could have joined for the Rannoch missions
4. Samara is a justicar she can do whatever she wants
2. His excuse was reasonable enough for me. He was doing last minute tests on Eve to ensure the cures viability. There are other ways they could had went with it, sure, but I'm not going to pretend the presented scenario doesn't work well for the story. Plus Mordin is a key critical role in this mission - if anything was to happen to him things would be... problematic.
3. That would had been nice.
4. As long as the code allows it, you mean.
If you recall I actually pointed out that her excuse was flimsy and didn't fit well. I wasn't defending it, I criticized it.
It's also perhaps important to note for context that while you seem to be referring to minor one-or-two missions where they could temporarily join you, I was talking about why they don't join your squad indefinitely, like your included fanart picture demonstrates in the squad selection screen.
They all know better than anyone what's at stake and that Shepard is clearly the best person to aid in the fight but they just blow you off for their silly personal reasons
Who gives personal reasons? Jacob and Miranda? You could argue Jack but she does actually play a role in the war effort so its not entirely personal. Certainly not 'all' of the squad, you're blowing it out of proportion. Most of your ex-squad are helping out the war effort in their own way, many still in ways that are more significant then they could had achieved as just another soldier under Shepard's command. Hell, the virmire survivor is actually more useful as a war asset than as a squadie.
Lets not kid ourselves the only reason why the ME2 squadmates got screwed over in ME 3 is that Bioware didn't had or didn't want to waste resources for characters that could be dead and for also for replacements
Who's kidding themselves? This was the first thing I ever said here. Relax.
if the devs wanted them to fight with Shepard they would there is no logical character reason mate
Sigh, it was only a matter of time before the 'logical' defense came up. If I had a nickle for every time someone used that word as if it actually added credibility to their position... 
I stand by my earlier assumption that you're being too emotional about this and not seeing things clearly. For hanar's sake, Thane was a dying man in the hospital. You really think it makes no logical sense to keep him out of the battlefield? Poor Drell can't catch a break. There he is, out of time and literally on his last days just trying to have a peaceful end and you're going "not logical, not logical!" when he doesn't want to join up with you to fight the reapers.