Cannot say I feel much sympathy for them. If all they can do is cry about what they experience while showing absolutel no sympathy for the people they pepper spray and beat up for no good reason, then why should we care anything about them?
This isn't just a few rotten apples. They are letting their collegues run wild beating up protesters, or people they arrest. If you stand by and saying nothing you are complicit.
I will not call civilians complicit for no doing something because we risk getting beaten up and arrested if we intervene. However a fellow cop can intervene while having much stronger legal protections than a civilian.
They maced a disabled young mand and stole his artificial limbs. Where is the apology? Where are the other cops who should have stopped suched behavior.
As long as cops act as if they are above the law and can brutalize people as they feel, then it does not seem unreasonable that citizens act against them to pressure them to change. Let them know, they will be treated like shit until they acknowledge they need to reform and take responsibility for their actions.