My first exposure to Crouch was seeing him play drums for a David Murray trio at Studio Rivbea, substituting for Sonny Fortune at the last minute sometime back in '75 or '76. We walked out and got our money back. Then again, we didn't care for Murray at the time, either. Recently, though, I read in George Lewis' AACM book that Muhal Richard Abrams credited him with being a decent writer of melodies (IIRC). Nice to know he can write something, even if we've never heard them.
At any rate, Mr. Crouch reviewed Jerome Cooper's Unpredictability of Predictability record on About Time for the Village Voice, concluding that although Bert the Cat was great, the first side suite was too influenced by contemporary European Classical music. In response, Mr. Cooper wrote and recorded 'The Crouch Opinion' on Outer and Interactions, also for About Time.
I've never been assaulted physically by Mr. Crouch. His manner, on the one occasion I spoke to him, was a bit patronizing. I'm still waiting for 'Outlaws and Gladiators', his book about avant garde jazz. I guess it was permanently shelved when he went to Lincoln Center, but it's funny. Even though Crouch wrote some of the lessons for the Lincoln Center/NEA Jazz in the Schools program, their curriculum includes Braxton, Threadgill, and Douglas. As well as Crouch's (excuse the expression) bete noire, Bitches Brew. If you've seen the film Miles Electric, you know what I mean. And if you haven't, check it out for one of Mr. Crouch's most strident diatribes.
As for what happened to him, who knows? I don't know him personally. I've heard musicians call him 'The Benedict Arnold of Jazz', which seems to fit.