How do you know that the good cops don't report the bad ones? To just carelessly portray all cops are bad is a bit foolish. Like in life, there are good and bad in everything. Including the police, judges, lawyers, politicians. But your feelings seem to go further beyond that. It almost sounds personal. I don't know what you've been through, I haven't walked a mile in your shoes, but maybe you shouldn't be so judgmental towards the police until you deal with the dregs of society on a daily basis.
If, God forbid, you have lost someone you love to a cop, I hope you find peace in forgiveness, because take it from me, hate only eats you up inside. I hope I'm not coming across as being judgmental, that's not my intention at all. As a human being I care about you no matter what our beliefs are.