The best revenge ...
Is no revenge really. Find a life you like - note: I did not say love, I just said like, that's pretty much as good as it gets - and work to that. Be happy in that, and just forget those people.
Strip everything down to the essence. What is really important? What is critical? What is just so much BS?
If you're having problem with the people around you, move away from them. There are only roughly 6,896,988,430 other people in the world right now with you, you only need a few of them.
And get out of the house. Walk, ride a bike, hike, pick up trash, whatever. If you really want a good revenge, live long and healthy. Be fit. It's a lot easier for attractive people to make friends, and being in a good physical shape is the first step toward being attractive.