Help me make the right choice?

I have a (decent) job at a doctor's office making fairly decent money. Actually, because of my past experience in Emergency Medical Services, I make more than some who have been there longer than me. Because of a slip up (not mine), the word on my salary is out. Now there are a few who just will not quit looking for reasons to complain about me to the office manager. I have had my fill of being called to the office, so I have decided to give my resignation. Is this the right thing -- to let them win? I THINK will be happier elsewhere, but could this just be because of them? HELP!