Generalizations never help.. There may be bad police men. In some countries more, in others less. But there are definitely many nice police men who help keeping our societies safe. There are also countries, where police is known as "your friend and helper"
You think anarchy is better?
This is just some extremist facism bullshit and stupid.
If "good cops" actually existed and did their jobs, they would arrest the perpetrators of corruption and there wouldn't be any "bad cops". Given that bad cops are still quite prevalent we can deduce that good cops are a myth or are so few in number as to be irrelevant.
Some cops might help others as a hobby when they're not busy, but that's not what they're paid for. Cops are paid primarily to enforce bourgeois property rights and maintain the government, which in much of the English speaking world is a monarchy and/or a colony. Cops are soldiers in a war against the people.