"Edgy" lost all meaning long, long ago, I'd say at least 10ish years ago. It's used so broadly for anything remotely "un-wholesome" that it's become useless as a descriptor. Basically a catch-all term for any interaction or way of being that is any degree of uncomfortable or atypical, no matter how small. Wears black/dark clothing? Edgy. Not smiling/happy all the time? Edgy. Isn't a punching bag and sticks up for themselves? Edgy. Revenge or just desserts? Edgy. Any violence at all? Edgy. Flashy movements/attacks? Edgy.
It's beyond silly.