I didn't have a good love in his short life. Lucy li is old and afraid of his wife. When Pei abused Yu, he didn't stand up to protect him. I can't even be a vague woman under her husband's wings like most concubines.
Women, especially beautiful and intelligent women like Yu, will inevitably be extreme and surly and full of hatred for life once their feelings are frustrated. This is extreme self-abandonment, and it is also a self-destructive resentment. Once touched, it will turn into murderous.