What is the difference between filial impiety towards parents and parental impiety towards children, especially when children are subjected to humiliation and verbal abuse from their parents?

A child must preserve the status of their father, even if the father wrongs them, and a father must raise his children well. A father's "disobedience" to his child means his dereliction in fulfilling his son's rights. We advise the sister to be patient with her father and strive to win his affection. If that does not help, then there is no sin upon her. For her patience and kindness towards him will bring her ease.