I don't think that Smart is dumb... as a matter of fact, he says all the right things, and most of what he says about game plans, etc., makes sense. Forget the after-the-game conferences - he's just spinning things and sounds delusional. But when he's not spinning things, he seems knowledgeable. And he has a decent staff too.
His problem, I think, is that he's weak. He wants to be everyone's friend. So he plays too many people, too many minutes. And does crazy rotations just to he can get people in. Almost like a rec or Jr. High coach, who's worried about when/how to get players some PT. And there's no consequences for bad actions or choices. For example: we're getting killed and what we need is quality shots and good defense if we are to have any chance to get back in the game. But no... 10 secs left on the shot clock and Brooks chucks up a 30-ft airball!?!? No problem, here comes IT to replace TYREKE!!! Really? I'm shocked he had the balls to sit Cousins for an extra game after the suspension.
Get tough, coach Smart. Tighten the rotations, work with Petrie to get rid of redundant players and hopefully fill some gaps. COACH TO WIN and to develop the young guys, not to make friends.