Subconsciously a little inferior. Most of them were hurt by their families in childhood, or had unhappy and abused childhood. Different children have different childhood experiences, which affects whether they have a "masochistic tendency".
She will stay away from those who are good to herself and good to herself. Instead, she will get close to the person who hurts her, ignore her and make her feel pain. Even if others don't ask, she will make excessive sacrifices. The characteristics of the abused are bring disgrace to oneself, self-abuse, self-sacrifice and enjoyment of pain.