Am I the only one who kinda hate Jiho's sister, San?

I meed spoiler please

So basically this show about the past, during ML still child. Basically he got a good result from his test and want to show to his mother, so that she will be proud with him. At night when he want to see his mother, he hear that his parent argue about why the king allowed the empress to give born to ML just to be sacrife for the sake of his brother. The marriage between them is not from love, just political marriage but when the king see the empress during her second pregnancy they know that even though they not in love but they're link through their children love. That's why ML was born, but the empress just know about this (the sacrifice) just then, that why she become sad. ML shock after knew about this fact and believe the problem exist because of him. In the last pabel show FL give documents to her father, who is ML brother teacher.

Why i feel bad for Seymour 😔

Im sure Jace is that maid son with the nobleman