I started vouching for his leaving us after the Reading Cup defeat in 2011. My opinion was met with a huge wave of hostility (i know, right?), often I was demanded to name a realistic replacement, rather than anyone being interested in discussing the limitations of his tactics.
If you spotted that even before 2011 then kudos.
All in all, tho', I don't hate the man. I think he did a really good job for us considering the years before, but he hit his personal glass ceiling probably after the 08/09 season.
Where he really went down in mine (and almost everyone else's) estimation was his talking down of Everton as a second-class club even while he was still manager.
We're over him, that's for sure. And the Man U job may well prove he'll never have it so good as he had it at Everton (like many players who choose to leave us).