This isn't about hating Ralph(i'm not sure 'hate on' is grammatically correct) I can like someone as a person and still find him to be an subpar owner. I started going to games in 1970, I remember the bad times and there were a lot of them. Ralph seemed to be a better person after the super bowl era, but ask anyone around back then and he was pretty much universally disliked in Buffalo. He turned out to be a real nice guy, just didn't have enough on the field success for most of us long time fans.
If you're referring to the Knox era, getting rid of Knox was Ralph's biggest blunder in his time as owner, in my opinion.