what the hell are you talking about,
they are grooming a young girl so that they can sell her off and raise their wealth thats one thing the other they are jeopardizing her health and well being just so she doesnt "lose her valiue" it's disgusting, its not a mc reaction its a normal human reaction
Are you an MC? Because you talk just like one, assuming whatever you like and calling black and white as you like.
Rich family girls being raised for marriage is as old as civilization itself and genetically it's beneficial so it is not something our genes would fight.
"Some people" that assume such a situation is horrible torture for involved parties (doesn't have to be) would protest, media made sure these "some people" are "most people" by the standard media brainwashing.
So really, this is just a family of father, daughter & servants trying their hardest to get the best future for the daughter, she's not being forced or anything, she knows what is at stake and seeing how hard she's trying at it, she wants to succeed at "the game of life".
Now leave it to the author to twist this into some forced drama where MC has NO CHOICE but to SAVE the girl from her HORRIBLE circumstances by, oh I don't know, making her fall in love with him by turning himself into her only reliance through all kinds of nonsense plots by the author.