Should I go and dox someone?
That like something you should never do. Is there any reason you feel the need to dox someone?
Yes, I hate her because she's a cunt
You should never doxx someone, there is no valid reason for that. That's unacceptable.
I'm not a bad person.
I know you are a good person, but if you dox the person, you will be viewed as a bad person, especially on social media where it is frowned upon. Why not just ignore her if you hate her? It will cost you nothing and you can move on with your life and do the great things that I know you will be doing on day.