I just don't know how you can make this assertion.
They've hated every coach before. Why will that change?
Not every fan will, of course, but no matter who coaches next, a sizeable part of the people here will eventually turn on him.
Look at the other boards, here. A lot of folks at most of the team pages are disappointed with their coach. It's a constant.
When Quinn is gone, some will immediately moan that it's the wrong guy replacing him. Then, they'll stubbornly stay locked into that belief, no matter what happens.
Every fanbase, in every sport, eventually turns on the coach, with very few exceptions.