Defund the police. Demonize the police. Condemn the police. Remove any support from the local government. Remove any support from the community. And these are the type of people willing to be cops.
The solution to all of this is very simple. Require every cop to be bonded and insured. Just like every other professional job in America. (lawyers, doctors, plumbers, electricians,........) The insurance industry will weed out the bad ones within a year.