As some others have said in more colorful ways, being a good cop means doing everything you can under the law to get bad cops off the street. Bad cops doesn't just mean those taking bribes, planting evidence, etc. Bad cops includes police officers who unnecessarily approach situations with undue aggression and who unnecessarily escalate situations. I understand that much of an officer's interactions are either with people who aren't at their best or are with people who are just pain rotten to the core, but if that drives them into a pattern of cynicism and aggression not warranted by the situation, they can either self-report and get behind a desk and get counseling until their head gets back to a better place or they're bad cops.
I'm a law-abiding citizen. Minus some exceeding the posted speed limit here and there, I'm not causing trouble. I also happen to work late quite a bit, which has led to numerous interactions with the police. Nearly all of those have been completely reasonable where everyone was decent and the situation was handled without any issue (usually just a "why are you here at [late time]?" followed up with a reasonable explanation, maybe running plates, in and out in 3 minutes kind of thing). In a very small number of cases, I was met by an adrenaline-pumped idiot who was very obviously itching to rip me out of the car and beat the Hell out of me. I've been berated and goaded by a cop who was doing everything he could to escalate the situation to where he could take stronger action. As I said, it's a very tiny number of issues out of all the times I've had contact with officers and I've always kept my cool and been in the right to the point where it didn't turn into anything. But all it would take is one of those adrenaline-pumped alpha assholes deciding I looked at him wrong and but for a camera recording the incident, he could very easily write up the report such that I was the aggressor and was threatening toward him and resisted arrest, thereby justifying any injuries. With that report and the word of the sworn officer, I end up with a criminal record and losing everything I've earned in life.
And that's why it doesn't matter if there are 99 good cops for every one bad cop. Because that one bad cop can ruin so many peoples' lives. We as citizens are second-class when we file a report or step into a court room trying to stop a bad cop doing bad stuff. What's really needed are for all those cops who are decent people to start standing up against the ones who aren't, start calling them on their bullshit, start reporting them at work, and start testifying on behalf of people who are wronged by them. I understand that that hyper-aggressive adrenaline junky alpha asshole is great to have by your side when you're under fire, but you have a duty and a responsibility to either see that he gets right in the head or see that he finds a new profession where he doesn't have any legal authority. The more you protect assholes like that, the more of them you'll find around you and the more the citizens in your community will distrust and even hate the police.
I support the good cops out there trying to help good and decent people and do the right thing. As for the bad cops out for a thrill? Well at the very very least, I want them off the streets and getting help. Stop protecting them. Stop protecting people who protect them.