Jesus Christ. I believe you 100%. It's my experience that metro police are almost always where you find the unhelpful fucking assholes that fish for trouble. Sheriff's departments tend to (TEND TO) stock much more of the crowd of folks who got into law enforcement because they want to stop the bad guys as opposed to the type of people who jizz their pants about the thought of writing tickets to the homeless and beating the shit out of a disrespectful teen. God help you if the cop is wrong and they can see that they're wrong, because they'll never admit it and just lean on might makes right instead. You sure enough got to experience that.

There are some cops that are good people who really do just want to help, but I think that it either gets beaten out of them by the prevailing department culture across the US of "we're literally unironically at war with the populace", or they get run out of the department/job for not fitting in. Imo, that aspect of things has gotten noticably worse, not better. I'm sorry that happened to you.