Moving home might be a jump out of the frying pan and into the fire, chances are you will be met with the same situation wherever you live.
Passing bitchy comments about others is no different to bullying in my opinion and sadly some people thrive on being as cruel, mean and unpleasant as they possibly can.
Why should you move out simply because someone has an evil mind and a vicious tongue?
If your present home suits your needs then stay put, rise above the bitchiness - you will soon identify who to associate with, and carry on being a pleasant, friendly person. You will soon attract nice people who have no doubt been on the receiving end of the bitchiness themselves.