I agree that Barnes, Drew, Boeheim etc. are not great coaches. per se.
But getting better players than other teams is a HUGE part of winning.
LK is a terrific coach (who totally recruits by the rules) but he seldom has talent advantages over the top schools, hence is average record in the NCAA Tournament.
OU's losing to so many lower seeds was a little surprising, because it has happened to OU a lot but I would have thought some other teams would be worse.