https://www.mangago.zone/home/mangalist/2207133/ shes the horseman of the apocalypse. So this is right up her alley.
Herta
I actually read more dark-Mangas, but I'm too lazy to look thru my other accs.
https://www.mangago.zone/read-manga/kyoushitsu_jibaku_club/
https://www.mangago.zone/read-manga/manhole/
https://www.mangago.zone/read-manga/kimi_ni_koisuru_satsujinki/ (This one does have romance, but a really messed up one)
If you havent read Bastard yet than that. It's by the same author of everything you mentioned
It's also the best one
"Save Me" if you haven't yet!
Here's the link: https://www.mangago.zone/read-manga/save_me/
I second that. A masterpiece.
Ah yes I have read it
Could someone recommend me some dark stuff like shotgun boy, pig pen, sweet home??
Or any dark stuff would be nice with no love stuff going on..
Preferably manhwas!