Buzz is a good coach but he bails before he can build anything significant. Or maybe his ceiling is coaching good teams. This is his 5th job and he’s been fired from zero which is pretty rare. He leaves before expectations get elevated.
Since he left Marquette randomly 11 years ago - guess how many Sweet 16s he has…one. He has two other NCAA tournament wins in 11 years - not exactly elite level material.
The other way to frame his post Marquette career is that he has take over two rebuilding jobs. VT for sure and aTm is debatable, but Billy Kennedy didn't leave that program in a great place. So if you remove the first year at each stop for rebuilding/transition and take out the year the tournament was cancelled, that leave 8 seasons (four at each school). Each started with an NIT appearance then 3 straight NCAA appearance with all seasons being 20+ wins. In the 6 NCAA appearances he has won 4 games.
Having said that, by all accounts he is a kind of a weird guy and administrations seem to get tired of dealing with him after awhile. I remember a report while he was at Marquette where they said nobody knew where he was on any given day except one admin person who handled booking things for him. He was out on the road recruiting constantly, even during the season, and would meet his team at games.