Living well and having nothing to do with them is a kind of revenge because they are so jealous of happy people because at the root of things, N's are miserable. Nothing will ever be good enough and they're never satisfied--they can never appreciate the good in life or what they have, they always want better and more. The world is really an ugly place when all you see is negatives and that's the N's in my life are like.
My NMom tried to paint me as a whoring, drugging, drinking self-centered bitch, who only cared about herself to the extended family. Unfortunately for her, I married the only man I ever dated, have never done drugs (one sibling is an addict and dated a drug dealer and everyone in the family knows this), and anyone that matters knows I'm not a drinker. To put a cherry on top of the sundae, for a long while I was involved in helping abused women and children. I'm not saying I'm just like Mother Teresa, but compared to who she painted me to be, I was fricking Mother Teresa. Any rants about me were more of a reflection of her than me and just made her look bad to anybody with ears.
The best revenge is living your life without them in it and doing the best you can to salvage some happiness because they are incapable of true happiness and they will hate you for experiencing it. After her death, I found out my NMom was beyond jealous of me--she HATED me. She resented my happiness, my husband who dotes on me, my sense of humor, my friends that would do anything for me (and likewise)--she especially resented that my husband, a "boy from the wrong side of the tracks" that she tried to forbid me from dating because she was convinced we'd end up poor and living in a trailer, ended up excelling in his field and making well into the 6 figures. His bonus check the one year was more than my NDad made all year. That he wouldn't offer her any of his earnings was another revenge. And where did she end up? Living in the trailer she said we were doomed to. The best part is I never actively sought revenge---I just lived my life outside of the sphere of her control and thrived.
My point is, OP, things may seem bleak now, but they get better. I had a few horrible years where I felt zero hope for the future. VLC with my NMom helped tremendously. Focus on the good things in your life. N's have trained us to only see the negative things in life and it impedes our happiness. See what's right in your life and take steps to discover what makes you happy (it took me years to figure that out---I was clinically depressed and suicidal for YEARS). Shut out the enablers because they're N's in sheep's clothing and they're assholes who don't matter. Drown out the shitty voice in your head that tells you that you don't deserve happiness. You deserve happiness, OP. Once you realize that, you're halfway there. hugs