They have had numerous players decomit and leave the program because they get sick of his shit. His schtick is on 24/7 and wears thin for some.
College kids all the time get sick of coaches shit. Usually it's guys who think they should be playing and aren't.
It's not out of the realm that he's just a really good recruiter, good coach, and awful human.
There isn't much history to base his actual ability from, but he's on a similar path as he was at Western Michigan. No one knows if it's sustainable there or not, but based on what I've seen, he's got a top 3 team in the BTW, after three years.