I'm currently looking for some good stories in which a bully or group of bullies find the tables turned. This includes fake "friends" who set up a single extreme act to humiliate someone. For instance, a guy who always beats and extorts another guy one day finds that other guy stole his girl (like in NTR Shoujo where a guy who'd been using a "friend" gets his niece/lover stolen from him). Or perhaps a girl who always tortures a boy gets caught and the boy lets out all of his anger at her. Or a girl humiliates another girl or sets her up somehow and the victim then sets up for someone to make the perpetrator suffer. Many variations but the result is generally the same: a person who'd deliberately hurt someone else for petty reasons winds up suffering for it. Doesn't matter if the bully's "punishment" is excessive, it still has a certain cathartic effect. Also OK with people who are just excessively dismissive and insulting and cruel, putting the MC down far too strongly, as long as it's enough to seriously hurt the MC.

I don't know at all if this is what you're looking for but why not try Caste Heaven ?

It might, but I won't check to see because I absolutely detest yaoi. No offense to the BL fans out there but it's serious squick for me.

No problem ^^

Maybe I Decided in My Heart to Bring You Down!! then 🙂

As we're in the adult section I've only thought of hentai/yaoi/yuri but there must be a lot of seinen treating that subject as well so maybe you should add your topic in another section of the forums !
You can also use the Role Reversal tag 😉

Bit of a list, hard genre to look for:
Inuzuma
Play Until The End by Naokame
Bullied -Revenge Hypnosis- 1 & 2 by Aiue Oka
Obedient and Heartless by Hardboiled Yoshiko
Turnabout Four Eyes Kind of...
Pizza and the Little Bully Kind of...
Ou-sama App Definitely!
Ane-Bullying by Nagare Ippon
That's all I know about.

Bacchanals, to arms!
Quote of the Year (2017): "The mind is its own place, and in itself can make a heav'n of hell, a hell of heav'n." -John Milton

This maybe suit your taste "Jubaku no Stage"
Its about big brother avenge bullies who bullied his little sister