I skipped the steps of the application process that would have clued the agency in on my lack of fitness for the position. I made no effort to hide my public loathing of the agency, what it stands for, and the administration that runs it. And they offered me the job anyway.
Having said that, people leave our police force either mentally damaged or suicidal from the PTSD, physically broken or killed, or angry at the entire force at how they treat their resources (ie people). The goal is to retire-out, right around when you really hate the job, and have the body and mind to never look back.