As a 20+ year law enforcement veteran I know I may be biased on this one, but not as much as one might think.
There are several problems in the United States dealing with law enforcement. One of the main ones is that we have forgotten why we have civilian law enforcement and how civilian law enforcement is supposed to work.
In a free society, military forces are not to be used to enforce the law. The first civilian police force is the Metropolitan Police Department in London. Sir Robert Edmond Peel created it. Peel came up with the 9 Peelian Principles of Policing. One of which is -
To maintain at all times a relationship with the public that
gives reality to the historic tradition that the police are the public and that
the public are the police, the police being only members of the public who are
paid to give full-time attention to duties which are incumbent on every citizen
in the interests of community welfare and existence.
In short - there is no "thin blue line". We are all the police. We all have a civic duty to police our communities.
Instead, we have strayed from this. We say "Not my job. I pay taxes. Its too dangerous. You do it." Then we separate ourselves from the police as if police officers aren't even human. We make it an us against them mentality when in reality we are all on the same boat called "Earth."
People scream for police reform, but offer no real solutions and certainly excuse themselves from being part of the solution.
Things that would help -
Realize that the police don't make laws, they enforce them. Every law made implies that police will use force, possibly even deadly force, to enforce the law. Hold lawmakers accountable for bad laws. We do not want a police department that gets to decide what laws will be enforced and those won't.
Volunteer your time with your local police department. If your local police department has a ride-a-long program go out on patrol a few times to see what it is like. Get educated so you can be vocal to your local police chief and city elected officials as to what you would like from your police department.
Be part of the solution.