And clearly, this is not abuse of power. Abuse of power would be "give me a game worn jersey, or else I will arrest you" or "you didn't do anything wrong, but I am going to arrest you".
This does NOT feel like the cops were out of control at all, from what I've read. Quite the opposite, feels like they gave him every chance to straighten up.
You have next to zero facts to make this "assumption". But I guess everyone has to have an opinion on everything these days, even when they know nothing about the situation. Carry on.