I haven't posted about ME2 in probably 2-3 years, so I have a lot to say about that game.
Mass Effect 2 barely even has a story. The Illusive Man is a pretentious idiot and you're forced to play along with him while Shepard commits mercenary genocide and occasionally fights some stupid bugs. It also undermined the ending of the first game and made Shepard into a stupid magnetic hero, which admittedly is a running problem with Bioware protagonists, but ME2 takes it to the point that Shepard is HUMANITY'S LAST HOPE right from the start which is ridiculous. Honestly I don't actually like most of ME2 other than the settings and the combat. I feel like it homogenized the races of the galaxy too much, using entire races as clumsy analogues to human society rather than focusing on the dynamics of the galactic community and the Council. Thane is probably the worst of this, one of only two characters shown of his entire race and his backstory would be almost no different whatsoever if he was turian, human, or asari. It made the Council out to be stubborn idiots despite them having supported Shepard against Saren and justified humanity's whiny persecution complex. The game even has saying "Cerberus isn't so bad, they're helping people" as the Paragon option most of the time, when Shepard, the first human Spectre, joining a known human supremacist terrorist organization (they're not "human survivalist," that's just a euphemism even Ashley could see through), should be profoundly troubling. But no, Shepard can do no wrong, he/ she is a hero and everyone else is a big dumb-dumb who thinks the Reapers aren't real.
And as such we get ME3 ham-fistedly attempting to cram as many conflicts into one game as possible. You spend more time on Omega in ME2 than Shepard does saving entire species in ME3. It's full of contrived attempts at pathos, the worst by far being Duct Kid which fails on every single level, Mordin " I have to activate the bomb- I mean cure the genophage manually" Solus, Legion dying because apparently his wireless network can't handle uploading a code without nuking his own system?, expecting us to be sadder for Thessia than any other planet that isn't Earth for some reason. And all that alongside a constant stream of oh boohoo war is so awful, we have to stop them 
The reasoning for the Reapers being focused on humans was lost between games, and we're stuck with the explanation that "because Shepard killed Sovereign." That makes no sense. Shepard didn't kill Sovereign. He killed a Husk that Sovereign was controlling. Shepard broke Sovereign's guard and then the Citadel fleet stun-combod Sovereign to death. And yeah, they wouldn't have been able to stop Sovereign without Shepard. But the Reapers consider themselves infinitely above organic life. They wouldn't think like that. Unless Shepard personally flew into space and punched a hole through Sovereign like it was goddamn King Piccolo, I don't understand why the Reapers care about Shepard or humanity. But because the Reapers DO care about humanity, it justifies Shepard once again being a self-righteous ******* who can do no wrong even when he's asking people to abandon their home planet to come save London from giant cuttlefish. Even if your Shepard wasn't born on Earth and has no personal interest in Earth, but who cares about that anyway.
Really sounds like I don't like the series now, doesn't it
I really don't like the direction it went in story-wise after the first game, at least.