What bad thoughts can a female supporting character have

In every old-fashioned melodramatic novel, Nan Yan always transmigrates into various tragic supporting female characters. In World One, set in an ancient xianxia novel, her sister is a uniquely talented transmigrating woman who encourages Nan Yan from a young age to defy conventional norms and pursue her happiness. Consequently, on her wedding day, she decisively runs away, forcing the family to substitute Nan Yan in her place. The fiancé instantly realizes she’s an impostor and, after tormenting her, hands her off to a worthless male supporting character. Unable to bear the humiliation, he abandons her. The supporting character ends up captured by evil cultivators and becomes a sacrificial victim, dying a horrific death. Nan Yan remarks, “If you two had been decent people, the supporting character wouldn’t have met such a tragic end.”
In World Two, an old-school martial arts story, the supporting female character is the male protagonist’s childhood sweetheart, who he is fiercely possessive of. However, when the demonic sect’s female protagonist appears, he realizes true love. What he had with his childhood sweetheart was not love, but familial affection. Only the female protagonist brings him genuine emotional excitement, making leaving his childhood sweetheart and being with her the most important decision of his life. Nan Yan sarcastically comments on this revelation, pointing out the hypocrisy of his previous actions.
In World Three, set in an ancient rebirth story, the protagonist, having lived a chaotic previous life, is reborn and determined to cling to her hot-tempered childhood friend, who has a girlfriend. Despite this, she relentlessly pursues him, and eventually, unable to let go of his past, he reciprocates, leading them to end up together.
As more worlds await, the system delicately advises using the great and omnipotent power of love to teach them how to be better people. Holding a script full of absurdities, Nan Yan comments that it’s an impossible task, requiring a decade’s worth of brain strain to write such frustrating content, with less than a year’s effort not producing the same effect. The male leads are described as true scumbags, insane characters, and hypocrites, appearing human but acting far from it. Nan Yan’s missions include causing chaos, punishing the scum, and teaching these misguided characters to be better people.