JUCO Recruits were getting the answers to correspondence courses in advance from staff tutors. They got nailed with Academic Fraud/Lack of Institutional Control. This reduced the # of JUCO recruits they could take, which immediately impacted wins and losses.
Then, he started getting some heat for mistreatment of players (basically excessively hard coaching and verbal abuse), and they decided that without the wins, he wasn't worth the bad press anymore.