re: Why was Ray Perkins disliked so much when he was head coach?

Don't forget the way he fired people who had been in the program for a long time (Mal Moore, as example). A new HC should be able to make his own personnel decisions, but you don't fire someone who has been a lifer at a school by poking your head in their office on the first day and saying "We're not keeping you. You're fired".