For what it's worth, whatever lingering hate I may have had for my own collection of bullies (and there were many) finally dissipated when I came to realize that they were all carrying their own hells around inside them. I actually discovered that one of my worst tormentors ended up a wreck of an adult, and ultimately dead.
Sooner or later, accounts have a way of settling themselves.
You imply you've carved out a successful life for yourself. That would be what I refer to as "constructive revenge", the only kind worth having. I hope you can find it in yourself to leave it at that.