Municipalities need to pass new laws defining and setting punishments for reckless behavior on the part of the LEOs.

For example, reckless behavior would be:
Driving 90mph during a non-emergency.
Using lights and sirens during a non-emergency.
No-knock drugs raids.
Not doing proper research before conducting a raid.
Raiding a wrong address.
Shooting dogs that are running AWAY from them.
Shooting innocents, such as a seven-year-old girl.
Needlessly exposing LEOs to harm.
Allowing informants free passes on illegal activity.
Etc.

Run for your local town/city council or county board of supervisors or equivalent thereof and make these things happen.

On equipment: You get what you inspect, not what you expect.
On training: Our drills are bloodless battles so that our battles are bloody drills.
On tactics: Cheating just means you're serious about winning.