I never "believed," like some people did, that Al "was the right guy." But I was willing to adopt a wait-and-see attitude for a fairly long time, because a) he doesn't seem like a dumb guy, and b) some of the problems he was left with were pretty bad.
When he lost four straight (and by BIG scores...) to close out last season, it was clear that although the 'Canes talent level wasn't "back," it was nowhere near bad enough to justify the horror we were seeing. And then, when he did NOTHING to address the problems, it became clear that he's just not serious about being a good team.
So that's when I went from agnosticism to straight-out hate.