I think the drug war is bad for a wide variety of reasons, and the militarization of domestic policing (mainly over drugs, and now terrorism) is bad for everyone (including the police), but it's not because I've personally had problems with police.
I'm a white, upper-middle-class, works-with-USG/DOD, contracted in war zones, lots of friends in government/police, etc. person, so I have it exceptionally easy, sure.
I've met bad individual officers, but it's rare, so yeah, I generally do trust police, based on my personal experience. One of the worst tendencies of policing organizations is the "thin blue line", so they need to take aggressive action in cases of internal abuse to overcome that.