He got them to bowl games every year, and even had two NY6 bowl wins, along with another NY6 bowl appearance, as well as two top 10 finishes (and nearly a third).
Even last year, when everyone thought the season was going to stink, he still managed to pull it to a 9 win season.
Overall, he didn't seem to be any worse than Bielma had been for them, so I'm guessing that his attitude probably rubbed too many people the wrong way.