I think lots of the Clipper players don't like Doc Rivers and how he favors his son Austin who is on the team.
This is from Ryan Phillips,sports writer:
Paul’s relationship with Doc Rivers started to deteriorate rapidly after the Clippers acquired Austin Rivers. Several members of the team felt Austin acted entitled because his dad was both the coach and the President of Basketball Operations. In the view of the tenured players, Austin Rivers never tried to fit in, and when players tried to address the situation with him, he still did not respond the way the core of the team wanted him to. It led to resentment within the locker room, which often played out during games. One of Paul’s biggest contentions with Doc was that Paul, and other players, felt Doc treated Austin more favorably than other players. He would yell at guys for certain things during games and practices, but not get on Austin in the same manner for similar transgressions.