Police in the U.S. is a shit show and other countries are following because they all reduce the screening procedures, psychological care and training time. But just defunding them, without doing anything else, will make it worse.

You propaply have to build up some completely new type of police force, break it up and fill important positions with new people and start again from there.

Otherwise this will continue to spiral downwards. And with increasingly bad reputation of police you will attract more an more bad people into the job.