Red flag FL to redemption

Maybe:

Game Sanaeha

Hi My Sweetheart

Hometown Cha-Cha-Cha (not red flag, but definitely rude iirc)

More than Blue: The Series (not red flag, but at first FL bullying ML because his father killed her parents iirc BE for main couple)

Nice Flight! (not red flag, but kinda rude as part of her personality and mindset)

My Forever Sunshine

Our Beloved Summer

Pleasantly Surprised

Sweet Trap

Temperature of Love (not rude, but red flag)

• Glory: the FL took a man with amnesia and turned him into her stable boy to settle a score between them.

• Hi Venus: due to a misunderstanding, the FL did everything in her power to make her new director's life miserable.

• I Picked Up a Star on the Road: FL embroiled herself in a revenge fantasy-gone-wrong and held a man hostage.

• It's Okay to Not Be Okay: can't get redder than this FL. She's arrogant, rude, and stabbed people.

• My Lovely Sam Soon: Sam Soon was rude when it was warranted.

• My Only Love Song: FL was rude, spoiled, and arrogant.

• Perfect Crown: FL was overbearing, rude, and demanding.

• So I Married the Anti-Fan: FL blamed ML for losing her job and retaliated against him.

• The Judge from Hell: can't get ruder than a demon with a short temper and a penchant for maiming and murdering.

• Till the End of the Moon: FL was sent back in time to destroy the ML; she hated and tormented him. Poor Tantai Jin.

• Another Miss Oh: if I remember correctly, the FL was rude, but she had a right to be.

• Bound by Sin: FL was domineering and dismissive of the ML.

• Crazy Love: FL discovered she had a short time to live and fantasized about the retribution she could rain down on her narcissistic boss in the time she had left.