I mostly agree with your post, but I am going to suggest a few things that deserve argument.
First, while this may not apply universally to all police departments, I would not send police into areas where they are outgunned, and in many places, tactical rifles would be the only way to match the gangs.
Second, most police do not receive the level of training SWAT trained police get. So call them SWAT or something else, I think that training is important for police to master if they are going into gunfights. Maybe they should not be sent out as SWAT teams, but SWAT officers can help solve difficult shooter problems quickly and with minimum loss of civilian life.
But overall, yes, police are no longer part of the community in most areas, but instead are at odds with the people, always apprehensive and necessarily, in many cases, suspicious of the people they are supposed to protect.
Because Police Departments have become Feminized, which drove away good people from wanting to be Cops. So you get what is leftover.