Most of that is exactly what it says on the title: Shepard being a jerk. It is not sadism, following the definition of that word. The only examples I can think of are pushing the Merc out the window (and even there you could argue that you worry he will attack you.) and purposely leaving the Council to die because you don't like them.
Because we see bad trends in later games and want them to return to what was awesome in the past. Being a fan doesn't mean you like everything.
Some do, some don't. It depends on the story.
You're meta-gaming. You know the outcome and are using hindsight to evaluate the decision. Look at it based on what you know at the time.
ME2 renegade Shepard is bad, ME3 on the whole has a lot of bad things. ME1 was the series where it was more about union and consensus and the discussions of justice had real meaning, and conversely gave renegade options more meaning.
ME2 turns Shepard into a cartoon mustache-twirling villian for the most part, 3 just carries off into a deep territory period, ending aside.
Sorry to be short with your responses, but it's just not something I really want to spend anymore time on overall SWTOR has a much better overall system with the light/dark and I'd rather just play that than spend more time on ME, especially not really knowing what direction they'll end up going.
You're meta-gaming. You know the outcome and are using hindsight to evaluate the decision. Look at it based on what you know at the time.
I saved Wrex the first, second, every time. I'm guessing you didn't though. It wasn't even close actually, to the point where I was surprised that the option to take him out even showed up at all.
The only time I meta-gamed in the whole series was Council/Sovereign, because at that point it seemed like you were possibly sacrificing, well, like, everything lol (like you don't get to Sovereign in time and it just destroys everything and ends the game), and so when I learned you can save the council with no repercussions I was like well might as well just do that then.
I also waited a long time on Ashley/Kaidan, like it took some time and energy, but it also was pretty obvious that Ashley was going to be the right choice to save from the outset, and I was just coming to terms with that I suppose, and because the game made clear from the beginning the nature of the choice (one or the other) there was no need to metagame. Virmire on the whole was obviously the highpoint of the entire trilogy.
I'm not going to castigate ME2 and 3 more than I already have, it's unbecoming, suffice to say because I didn't really feel the same level of investment in the choices and outcomes I more or less just treated it like I do most games, more like a rail shooter or silly wild west kind of experience or something.
I mean to be completely honest mustache twirling cartoon villains are not even like my worst thing, like Boris and Natasha from Rocky and Bullwinkle it was like kind of so bad on one hand but still more fun than a lot of things.
And it's kind of a goofy fun wild west sort of game in some ways, almost like if someone made a Han Solo spinoff, that's what ME2 felt like.