When I was 18 the girl who had bullied me all through secondary school was in a horrific car accident and is permanently disabled. In a wheel chair, incontinent, can't speak, fed through a tube.
She was driving. The passengers all died.
I have never ever spoken to her again, our previous interaction was always through her bullying me.
I still see her being wheeled around.
While I feel sad for her family, and for her, I'm never going to be kind to her. I still feel a massive amount of guilt, even though I know that's ridiculous. But I won't, I absolutely won't pretend to care. It would be a lie.
It's an awful feeling, but I think I'd feel worse if I was kind.
Karma isn't always the balm people think it should be.
Big hugs OP. I hope you feel better about it all soon.