When your daughter tells you that she HATES the things you have been doing to her for the last 20 years, and that she's been thinking of dying because she seriously believes it's better to die than to go on living as your puppet...
... I kinda suspect that the right reaction isn't really to say: "Ah, good, Nagisa, you're finally standing up for yourself and challenging me! You have become strong-willed and assertive! This is great, my parenting is a success!"