Sully's problem is entirely himself. His own father said (about the Cs being interested in him), "I'm not sure that would change anything for him. He has to make up his mind about what’s important But if you’re going to stand in the way of progress, then get out of the way. . . . All I know for sure is that the signs aren’t good. Even if Phoenix kept him, that wouldn’t have made it any better for him. He still has to face himself. As a dad, man, it hurts. But water seeks its own level. It’s up to him.”
The guy disappointingly didn't put in the work to get in shape for even his contract season. Then he only got a one year, $5.6m deal and even then didn't perform. So I agree with the OP. I'm happy he's gone. This team doesn't need a guy sitting on the bench wasting his talent and infecting anyone else with his laziness. If he got his head screwed on straight and decided to be a professional I'd love to have him because he has the God-given talent to be a good player. He's just electing to waste it and that's why he's sitting at home and the phone isn't ringing.