More than half of my (quite few) interactions with police in my lifetime have been unpleasant, IME too many officers seem to be on a power trip and more interested in ordering people around than treating them with respect.
One that has stuck with me for almost 40 years, as a young woman driving in an unfamiliar city (before the days of Google maps) there was a police car making a left turn onto a street and I made a left turn after him. He got out and started screaming at me. I had no idea what I had done wrong, apparently it was a bus lane only, which I had never heard of. I had out of state plates and instead of explaining the violation I was just yelled at and reduced to tears. I would have preferred a polite ticket than all his anger.
I make it a point to avoid police officers as much as possible. I have seen enough body cam videos of aggressive traffic stops, approaching people with guns drawn and yanking them out of cars for no reason, or instead of pulling over a car just ramming into it (it was a mistaken identity, oops!), I do not trust police at all.