Why was his daughter so horrible?
Her father is clearly schizophrenic, struggling with severe mental illness, and her sole response is either to give him the cold shoulder or yell about how his whole life is worthless. What kind of person says that to someone who is so ill and clearly struggling with everyday life?
The hospital scene at the end between them was nonsensical. It didn't feel earned. She treated him like *beep* and yet showed no remorse, no hints of guilt that the mentally ill guy she laid into tried to kill himself. Nothing of the kind.
Were we meant to sympathise with her?