probation/parole is a broken system. it would be difficult not to become discouraged/burnout/etc. unless you were prone towards being complacent.
As far as being an officer... its a very important job with awesome responsibility that gets no respect whatsoever and due to its connotations, reputation, and pay -- on average the worst of the candidates are attracted... the people who would benefit themselves and others (society) by taking the role are generally turned away. I really dont know where you fall into that equation, i'm only giving you a perspective.
Not to mention according to your avatar your carrier choice may cause you to become a hypocrite.