This one counts, I guess?: https://www.mangago.zone/read-manga/doukyuusei_a/
The bottom is the bully but it's serious serious: https://www.mangago.zone/read-manga/sono_kuchibiru_ni_yoru_no_tsuyu/
Kinda serious but the uke is a M so: https://www.mangago.zone/read-manga/sneaky_red/
Non romance and the fl takes revenge, this is such a good read: https://www.mangago.zone/read-manga/maria_no_danzai/
Non romance but I dropped it. It's good but I lost interest: https://www.mangago.zone/read-manga/juujika_no_rokunin/
https://www.mangago.zone/read-manga/itonaga_kun_no_koi_no_ito/
https://www.mangago.zone/read-manga/cosmic_boy/
https://www.mangago.zone/read-manga/minority_1/ (although I don’t think seme directly bullied uke)
https://www.mangago.zone/read-manga/geu_kkeute_issneun_geos/
Hopefully one of these fits what you’re looking for.
Looking for a BL where the top is an actual real bully and not like playful teasing. I liked Sneaky Red and I loved Ijime-kko ni Fukushu. I also especially liked the beginning of Please Don’t Tease Me Nagatoro.
I prefer BLs but I’m open to GL, straight or even non romance tbh.
I’ve tried looking through the tags but its just pages of playful teasing type bullies, so I turned to asking for recs