If you are a writer looking to capture this "painful dirty" vibe, abandon the romance beat sheet. Instead, use the Sinnistarcom Manifesto:
Every romantic storyline in this genre has a Third Act that is not a reconciliation, but a revelation of disgust. The climax is not getting back together; it is one character realizing they have become a person they despise because of the other. That realization is the plot.
The attractive lead cannot be entirely sympathetic. They must do something unforgivable by the midpoint—lie about a pregnancy, destroy a sentimental object, sleep with a sibling. The audience should want to stop rooting for them, even though they can't. If you are a writer looking to capture
The Setup: Two exes who cannot afford to move out. They share a studio apartment. They bring home new dates. They pretend to be indifferent. The Dirt: They still have sex, but only when drunk or angry. They sabotage each other's new relationships by "accidentally" walking in naked. The toothbrush never moves from the cup. The Painful Moment: One character finally finds a new apartment. The other, in a panic, destroys the security deposit by flooding the kitchen. Not to stop them leaving, but to force one more "cleaning up the mess together" montage.
A married couple runs a “relationship repair” cult. Their secret: they’ve never forgiven each other for a miscarriage that one of them secretly caused. “I don’t need you to save me
“I don’t need you to save me. I need you to hold my hair back while I throw up someone else’s name.”
“You’re not my red flag. You’re my whole burn unit.” “You’re not my red flag
“We don’t make love. We make evidence.”
“He said ‘I love you’ like a man reading a ransom note.”