It’s pretty obvious that Mass Effect 3’s ending couldn’t have lived up to the expectations of some of the series’ fans. However, what Mass Effect fans got was an ending that did far less than fail to live up to their expectations: It failed to be logical, provide emotional closure, or even be consistent with itself.
One really has to wonder what happened at Bioware that led to this mess being released. I don’t think I have seen a single person who expressed more than a hesitant acceptance of the ending. When the best even the most rabid fanboys has to say is, “Well, I can kind of see how it might work,” you have probably erred horrendously.