You can live in your own pretend society or you can deal with the one you're actually in right now - which includes things like laws and law enforcement. And you have options.

But taking a negative attitude so general as "all police officers are agents of state violence" has no positive outcome. You just decided every interaction you have with cops will turn out bad (or violent), so of course you're going to have issues! The rest of us try to treat each other fairly and as a result 99% of the time don't have problems with cops (unless we're breaking the law, wherein naturally problems do arise).

Also, your job isn't the only thing that may make one have personal problems with someone else. I tend to get pissed off at immature anarchopunks who think the world revolves around them. I guess it kind of goes both ways.