Looking for EXTREMELY dark romance with an absolutely unhinged MMC + doormat FMC

I feel like I’ve exhausted the usual dark romance recommendations, so I’m coming to Reddit because surely someone here has something I’ve somehow missed. 😭

I’m looking for pitch-black contemporary dark romance where the MMC is genuinely unhinged, cruel, obsessive, possessive, manipulative, sadistic, etc. — not just a morally grey billionaire/mafia guy who is mean for 50 pages and then turns into a cinnamon roll.

Bonus/major preference: I LOVE millionaire/billionaire and mafia settings. Give me filthy-rich, powerful, untouchable MMCs who have way too much money/power and absolutely no moral compass. Mafia families, crime empires, billionaires, CEOs, powerful businessmen, etc. are all very welcome.

And PLEASE give me a doormat FMC. I don’t want the usual “she’s a badass who secretly loves being challenged” heroine. I want an FMC who is genuinely submissive/terrified/obedient and folds under the MMC’s control. Basically: the more psychologically fucked up the relationship, the better. 💀

I’m okay with:
Non-con / dub-con
Sharing during non-con
Extreme power imbalance
Bullying/abuse
Psychological manipulation
Possessive/obsessive MMC
Sadistic MMC
Mafia/crime
Billionaire/millionaire/CEO MMC
MMC who does NOT get redeemed
HEA or extremely fucked-up HEA
Even no HEA

Hard no’s:
❌ Reverse harem
❌ Poly romance
❌ Fantasy
❌ Paranormal
❌ Sci-fi
❌ Cheating
❌ Love triangles
❌ Pregnancy
❌ MMC suddenly becoming a sweetheart because he fell in love

For reference, I’ve already read:
Brethren Lords — Ellie Sanders
Servitude to the Serpents
A Wife for Silas
Torment
A LOT of Sky Blu
A LOT of Lauren Biel
The Life of Anna
Deliria / Deliria: HARD VERSION
Take Me
Saving the Angel of Death

So please don’t give me the standard Haunting Adeline / Rina Kent / “dark romance starter pack” recommendations. 😂 I’ve probably already read or tried them.
I want the obscure, genuinely fucked-up recommendations.
Give me the books where you finished reading and thought:
“What the actual fuck did I just read?” 💀
Bonus points if the MMC makes other dark romance MMCs look well-adjusted.

*used chatgpt to write clearer post