> despite most of them being professional and doing their jobs the best they can
I've gotta question your interactions with the police, if this is your stance. Maybe you live somewhere with a decent police force? But my experience is precisely the opposite of what you're describing here. I was arrested last year, during the George Floyd protests, for precisely nothing (I was recording the police beating a man in front of me). I was tackled to the ground by 3 police officers while my hands were over my head. Bloody and bruised, when I arrived at the police precinct, the ~20 officers standing out front mocked me, laughed at the fact that I was bloody. I said not one word.
Every officer I encountered that night was the antithesis of professional or "doing their best". They were goons and bullies.
With respect to the crime wave: crime is increasing across the US, regardless of political slant of the city. Crime is increasing in NYC, despite the NYPD being larger than the next 3 police forces in the US combined. Maybe raw spending / police presence isn't the only factor in crime statistics.
ETA: For whatever it's worth, my case was immediately thrown out in court, and the officer who arrested me is under investigation for misconduct.