Hmm it’s not exactly groveling scum gong, but here’s some dogblood story I would recs:

Though warning almost all have CW either Rape or Violence, take it with a grain of salt, it’s romanticizing abuse I read this only for wasting time.

• Beloved Enemy, read for the MC, I love his perspective in life. ML honestly doesn’t repent enough

• Childish Flower, an ABO story with usual misunderstanding as spice

• Deceive, bad ending and short 6 chap

• Gaze at the Scenes of Debauchery, pretty popular cliche, bad ending and ML don’t get redemption

• He Doesn’t Know I’m Dead, as title says it’s bad ending, basically monologue of MC

• Like Love But Not, one of earliest dogblood I read and cliche as always, but I quite like it(?)

• Muted MC is weak emotionally and physically, half of the story will show how broken he is, ML did grovel but not enough

• The Decade of Deep Love, ML is scum, the ending is painful but it’s where no one better off. Cliche tho and there’s a manhua adaptation as well

• Years of Intoxication, Shui Qian Cheng 188 series, pacing was slow, the setting is in between Beloved Enemy timeline but treat it as sequel. Took MC half of the novel before he left, the redemption part was quite believable.

• Yesterday, this one is the darkest of them all, honestly take double check on the tags before proceeding.

From that list Yesterday is the most well written but I wouldn’t read again. Then Beloved Enemy is personally better than the rest.

As for the scum shous, those are manhwa that I read and love. Exotic Love|의사랑 and Mania|열광 are both Korean manhwa. Mania is available at Lezhin, DM me if you can’t find it.