Abusive relationships exist because they provide enough rations of warmth, laughter, and affection to clutch onto like a security blanket in the heap of degradation. The good times are the initial euphoria that keeps addicts draining their wallets for toxic substances to inject into their veins. Scraps of love are food for an abusive relationship.
Carl’s abuse isn’t obvious. It’s not something one can even notice while it’s happening. Carl doesn’t do you the favor of punching you in the face and sending you to school with a black eye so that you have a fighting chance of being rescued. Carl doesn’t hit, scream, or molest, allowing you to know you’re being mistreated.