More like 90% love him, and most of the former players who slag him are sour grapes.
Torts did his best to rehabilitate Hayes, tried him at wing, then at 3C with JVR and Allison. Hayes did play better when he returned to center, but he just isn't suited to Torts' up tempo style of play. The league knows what he is and he isn't, he can score at a 2C level in the right situation, but he's a deliberate player who isn't suited to a high speed game.
There are HCs/GMs who will feel they can get good value from Hayes in the right situation and at the right price/salary.
You're not going to get a 1st for him, but you might get a 2nd/3rd with salary retained or a bad contract coming back.