Bullies and sociopaths need to be weeded out, not promoted.
I kinda have a verbal presentation mapped out where I liken the problem that the police agencies have with that of the petroleum refining industry: workplace safety. For much of my life I lived within rumbling distance of refinery explosions, so the very real increase in observation of safety consciousness at refineries was noticeable over time.
As everywhere, the chief problem was continued employment of (or management by) people who either couldn't understand safe operating or who couldn't give a damn. The realization that one of the main threats to employment was the plant being erased along with a dozen or three of the local membership even got unions interested in working with management on safety, though under the guise of cooperating with EPA/etc. enforcement against the companies. Move a couple hopeless fools out of the plant and everyone else doesn't have 6-month furloughs for rebuilding and memorials.
That guy that can't keep his mouth or fists under control? Say hello to Torrance the Torquer who just couldn't help giving every bolt an extra turn or two, on every inspection. "Eh, those nuts are tough enough for another twist!", he'd always say, having no understanding of hydrogen embrittlement or other non-ideal conditions. A couple more twists and little temperature or pressure change, and boom, though not necessarily on his shift. Afterwards the investigators say, "well of course those nuts cracked! Look at the tension!"
The tension, the disrespect and obstruction, the mounting willingness to disbelieve any blameshifting explanation, hey, even the gunshots in their direction, just might motivate the policing 'industry' to remove the small number of makers of trouble in their ranks. It is their own interest to clean up their 'workplace'. Hell, even the unions should figure it out and stop the hair-trigger-shotgun union spokesmen parroting "it's someone else's fault!" *every* *single* time.
Reviewing accurately and getting rid of the bottom 2-5% will greatly improve the lives of all the other officers. Oh, and "the plebs" too.