There sure are asshole cop thugs. There sure are awesome cops.
The problem is not really about cops as individuals. The problem is that the institution of the police no longer resembles what it did 30 years ago. The trend has been increasing institutional impunity, increasing militarization, increasingly answering problems in the public and private spheres with police as first responders (along with decreases in things like institutional mental health support), increasingly complementing the police's lethal weapons with "non-lethal" anti-crowd/pro-torture weaponry.
If you want to less of this monstrous bullshit, reform the institutional shape of the police.
You will need to take on the police unions while you are at it (I am not anti-union, just acknowledging the role they play in creating today's police institution).