Beth sees the people in her life as either complete villains or total heroes. this way of thinking of the world in black-and-white terms is called spitting
Splitting is a psychological mechanism that allows people to tolerate difficult and overwhelming emotions by viewing others as good or bad, idealized or devalued.
This makes it easier for them to manage their emotions, which appear to be contradictory on the surface.
Dissociative identity disorder (DID) is a mental disorder in which a person has two or more distinct personalities.\
Each personality's thoughts, actions, and behaviors may be completely different. Trauma is a common cause of this condition, especially in childhood.