Police departments all across the country are having trouble finding recruits. The problem is society making the job of basic policing difficult.
People watch a few videos on Youtube and now they think they can turn into an expert on the road, trying their case not before a judge but in the middle of traffic, not complying with basic requests for ID and other sorts of nonsense, not rolling down their window, not giving their name, escalating a minor infraction into a deadly situation ... all while filming themselves to get some views on social media from strangers they never met. There are also people who go around deliberately antagonizing police and posting the videos on Youtube, FB, etc.
Would you want the job of enforcing laws for low pay while risking your life to help people who go bezerk when you try to confront them? And if you have to take a life in self defense, heaven help you. An accident can turn into a murder charge or a lawsuit against the city.
So yes, hold police accountable but do not make the job intolerable or no one will do it. Support the police. Support law enforcement.
My advise, worthless as I know it is, would be to relax. I think the way you see the world is right, but it is limited. As a conservative you have moral concerns that are much stronger in certain areas than is the case for liberals and respect for authority is one of them. The whole point and evolutionary benefits that the human use of language and verbal and later written communication brought to the table was to be able to transmit living experience of elders to their children, to teach them survival skills. This was such a profound evolutionary advantage to our ancestors that it lead to a genetically inheritable tendency to codify respect for elders into our culture and even our genes. People who respect authority survive and those who don't don't always survive their real life lessons.
So this innate genetic wisdom, respect for elders, respect for authority, respect for parents, respect for culture is a survival adaption to defeat Darwin, if you will.
Liberals, of course, by the same wisdom of lived experience, discovered they can be manipulated by a demand of respect. They realized that respect has to be warranted rather that being just mechanically deferential. Without liberal thinking we would all be lemmings and follow some mad man off a cliff into the sea. Liberals that reject authority out of constant experience of being told to live by terrible advise can fall prey to pooping on authority that is truly authoritative and deservedly.
So I would say appreciate the fact that you hold moral concerns of great value and try to learn from liberals who are quicker to spot fakes. In this way your moral values will not be compromised and their precision in terms of applicability will sharpen. The potential for bad police who abuse their authority does not and should not affect the fact that it's not a good idea to reject all authority. Liberals who tell you otherwise are nuts but so many of them here, that is not what they are saying. Note too, that as you fear a world that has rejected real authority and are fierce in defending it, so too are liberals terrified of a world full of lemmings. They too, out of the same feeling, actually the constriction of feeling, they too can get pretty mean. So, not the left or the right but a third way. Propaganda and ego identifications make knowing who deserves respect and who does not a difficult issue.