Responses
She didn't win the tournament in her past life, she stayed home while her older brothers participated because she wanted them to have their moment to shine.
If she had participated she knew she would win and wouldn't earn their affection. I think it was mentioned she rose in rank as a knight or something like that.
Feel free to correct me if I got that wrong though.

He only see her worth because of her skill not because she's family. In the first timeline, didnt she won the tournament and yet they didnt even care to look for her when she was missing. JUST FCKK OFF DONT COME NEAR HER AGAIN