The fact that the reapers could just make the journey back to the galaxy on their own in 2-3 years, that made ME1, ME2, and the lore-history behind them (with Sovereign planning for centuries) completely irrelevant.
Jesus loves everyone! Except people still whining about the refs in Super Bowl XL or XLIII. He's sick of your complaining.
Crucible deus ex machina Kai Leng's plot armor (Because Thane would actually miss from 5 meters out) Cerberus's infinite resources Legion dies for no explainable reason except to create drama. EDI gets a body VS is knocked out for 3/4 of the game Kai Leng's plot armor (lolgunshipoutofnowhere) The Ending Way to human-centric.
...The only good thing about ME3's story was Tuchanka.
"In Mass Effect 3, the path to victory is less clear at the outset. You wont just find some long-lost Reaper off button."-Casey ******* Hudson.