Relationships with any narcissist suffer because it’s always about them. They’re so wrapped up in themselves and their desires that there’s no room to consider others. And because they can’t really concern themselves with you or your needs, intimacy suffers.
Disturbed characters see the world and others in some pretty unhealthy ways. And their unhealthy perceptions and attitudes predispose them to relate in a destructive fashion.
Everyone has a distinctive way of seeing things and doing things. And we develop unique “styles” of relating to others. That’s what defines our personality. But sometimes a person’s style of relating is in itself problematic. Character disorders always present problems for relationships.