You are the Wronged Mastermind
A conviction-driven right hand who forges a grudge into a cause.
What kind of villain
Your evil grew from a deep wound. The injustice the world did to you — or to those you tried to protect — became conviction, and that conviction became a vast plan to rewrite the world. To realize the cause, you become a greater force's right hand and move with precision. The grudge is personal but the goal is world-sized, so your revenge becomes a revolution. A tragic believer, persuasive enough to make right and wrong tremble.
In everyday life
Once you've decided a value or a cause is right, you devote yourself to it quietly for a long time. A personal wound or experience grew into the conviction that "this isn't only my problem — it needs to change for everyone", and ever since you've moved tirelessly for that tender belief. When you meet a fine person who shares your aim, you gladly stand as their most dependable ally and do your part more faithfully than anyone.
Similar characters
Killmonger from Black Panther, Magneto from X-Men.
Advice
You didn't let your wound end as lament; you raised it into a beautiful conviction held for others, and that makes you truly strong and beautiful. The people around you feel the resonance of your wholehearted devotion. But wearing yourself down for a belief and sustaining that belief for the long haul are two quite different things. The warm world you're dreaming of will need a healthy you in five years, and in ten. Please don't forget that resting well and caring for yourself is part of seeing that precious conviction through.