This story is what true villainess novels should be like. Tia didn't lose braincells after being reborn or meeting the ML., the ML isn't OP,nor did they fall in love at first sight. She's smart and stayed smart. She's cruel and stayed cruel because she needs to.
The romance is nicely sprinkled just in, but let's be honest, we've seen that kind of romance multiple times but this is the first time I'm reading something so politically intriguing. There's tension and the way the story advances is enough to keep you in the dark while explaining previous points. I really feel like those people are just pieces on a chessboard for her.
Maybe to some this is generic, but I can't fathom how they can think this is generic.
ML is flawed and not in the "Oh he had such a rough childhood now he's cold, perfect, and super OP" type
MC is flawed.
Antagonist is flawed.