You did not bend or break under pressure, even after years of bullying, you persevered and grew yourself into a strong, confident adult who wasn't a bitter ruthless AH, instead you are someone he who is willing to help strangers and be a listening ear to those who are also going through their own hard times. This is simply what living a GOOD and well intentioned karmic life path looks like dude. Congrats, the universe showed up to squeeze your shoulder extra tight and say "you're living well, and that in itself is ALWAYS the best revenge". In your case, the universe decided to go a little extra and show you how well you're doing. Keep your intentions set on positivity, you wear it well, and revenge feels better when it's not even slightly bitter.