What do you mean their opinion doesn't matter? Of course everyone gets to weigh in on whether or not parks are subsidized - cities are not run by dictators
... and ...
the last time I needed the police, then didn't even come out to look at my vandalized car, they just had me fill out an online form to report it. In your unsubsidized city, why wouldn't you fund those services with user fees?
Funny how contradictory these statements are. City police is financed by the taxpayers of the city, and the citizens are free to weigh in, and the police chief is not a dictator... except when he is, as he denies you the service that you have already paid for.
As you noticed, I am proposing to not pay for fire and police per call simply because they are equally needed by all, at more or less the same rate. Charing per call would result in the same distribution of fees. However firefighting services often charge those who are responsible for fires, and those are some serious expenses ($10-20K, if the fire was large enough.) Ambulances are already private, and they charge you for a ride. Police will charge you if your house's alarm system triggers too often in error (there are a couple of free false alarms per year, or something - depends on the city.) Also the city nearby charges a separate tax on alarm systems, to help pay the extra expenses incurred by the police.
Most of our city parks do have homeless drug users in the bushes, but that doesn't make them awful places.
One person's measure of awfulness may differ from another person's measure. But you are right in some way. I often see people driving trucks that are covered in graffiti; and I see joggers that jog through trash-littered areas, navigating around homeless. I am amazed how well trained they are to tune out those aspects of civilization. I cannot do that as good as experienced riders of NYC subway do - who, clothed in very expensive business suits, walk around pools of supicious liquids on the floor and pretend that there is nothing there, and that the stench is just light fragrance of roses. Yes, I am quick to leave such places to never return. Having been born and raised in a 10M+ city made me hate crowds. Harry Harrison's short story Make Room! Make Room! resonates with me, and I understand Solarians.