That's a huge part of the reason why he left but the other part is he didn't like how Riley ran the organization like a dictator. It was Riley's way or the highway and that was a big a reason why he was wiling to go back to Cleveland despite his disdain for Gilbert. Gilbert was willing to give him full control of the organization and let him do whatever he wanted. Riley is an old school conservative guy and is too set in his ways to change at his old age. He would treat Kawhi and Uncle Dennis the same way he treated Lebron. No way he would allow them to bend him over.