We are stuck with his salary, lack of interest from other teams due to that imbecilic contract, lack of sustained defense and most importantly he chokes when his feet are in the paint (example- 2016 playoffs)
In European and Chinese teams, they just stop paying you, if they want you to quit. Every season, I read about some former NBA player returning to the U.S. after "contract problems." Back in my day, the owner just called Luigi Bambamdarami.