So apparently the ME3 fans have completely lost it, and now they're trying to complain to the Federal Trade Commission. I can understand being upset by the ending, but I disagree that Bioware betrayed the fans with it. With the theorized DLC that gives a perfect ending, maybe, but not with the ending given in the game.
( Here follows a bunch of ranting about why the end of Mass Effect 3 was thematically appropriate given the storyline and events. Spoilers ahead, you have been warned. )