There are problems with policing that are pretty universal, some of which are acknowledged in Peel's Principles of Policing way back with the Bow Street Runners. But while those principles are taught to every cadet, here in the states we otherwise ignore them.

There's absolutely problems with drift, away from participation of the community and toward control, and while I can't speak for which part of the Americas you're in (the RCM have enough annual incidents to fall neatly into the ACAB category) I can say there are problems with giving one group of people authority over the rest that we've yet to fully solve.

Still, it's especially bad in the states, and when black US tourists find themselves in conversation with law enforcement in Europe, the extreme level of contrition they sometimes show is an embarrassment to everyone, but a shame of the United States.