This ones Twisted/Murder/Torture etc
Mixed genre
http://www.mangago.zone/home/mangalist/582156/
Not sure if these fit but some I hv in mind
http://www.mangago.zone/read-manga/jinrou_game/
+ The sequel
http://www.mangago.zone/read-manga/jinrou_game_beast_side/
(Without spoiling too much : the MCs moral compass overtime change and get worse)
http://www.mangago.zone/read-manga/interview_with_a_murderer/
(Twisted characters)
http://www.mangago.zone/read-manga/the_hero_who_seeks_revenge_shall_exterminate_with_darkness/
(Pure revenge)
Bi No Isu, MADK,
Maybe Down and Dirty? the seme is very anti hero but not evil..
For non yaoi, maybe
http://www.mangago.zone/read-manga/kono_ai_wa_itan/
http://www.mangago.zone/read-manga/ya_san/
http://www.mangago.zone/read-manga/adolte_and_adarte/
http://www.mangago.zone/read-manga/killing_stalking/?av=2
http://www.mangago.zone/read-manga/dogma_akabeko/
http://www.mangago.zone/read-manga/the_beautiful_ones/
http://www.mangago.zone/read-manga/parasite_suh_woo_suk/
And all of Harada's works lol
http://www.mangago.zone/read-manga/homunculus/
MC does some fucked up shit but the entire time you’re just like go hole boy go!
http://www.mangago.zone/home/mangalist/460408/ Oh I forgot to mention but maybe you’ll find something in here.
there are lots of horror and edgy manga, but the mc usually supports good and stuff. I want a manga that is really fucked up and nothing is good. It does not have to be sad just as long as the character does not have "good morals" a example could be hungry prince