In a situation like this, there can be several reasons why a narcissistic person would feel annoyed and angry when you cut them off, even if they have found other sources of supply:
Ego and Narcissistic Injury: Narcissistic individuals have fragile self-esteem and a grandiose sense of self-importance. When someone cuts them off, it can be a blow to their ego, leading to what's known as "narcissistic injury." They may feel offended, hurt, or rejected, which triggers their anger and resentment.
Need for Control: Narcissists often seek to maintain control over people around them. When you choose to distance yourself or end the friendship, it challenges their sense of control and superiority over you, leading to frustration and anger.
Loss of Supply: Even if the narcissist has other sources of supply, they may still miss the emotional validation and attention they received from you. Losing any source of narcissistic supply can be unsettling for them, and they might try to regain that supply by attempting to reconnect with you or getting you back under their influence.
Fear of Exposure: When someone cuts ties with a narcissist, they may fear that their true nature and manipulative behaviors will be revealed. They might feel threatened by your independence and fear that you'll expose their actions to others.
Sense of Entitlement: Narcissists often have an entitled mindset, believing they deserve special treatment and that others should always be available to meet their needs. When you break away, they may feel indignant and outraged, unable to accept that you've chosen to prioritize your own well-being.
Lack of Empathy: Narcissists generally have a limited capacity for empathy and struggle to understand or validate the emotions of others. As a result, they may not comprehend why you decided to move on or why you feel happier without them, leading to confusion and irritation.
Hoovering: After being cut off, some narcissists engage in a tactic called "hoovering," where they try to draw you back into the relationship using manipulation and promises of change. They might be mad because their attempts to hoover you back failed.
It's essential to remember that narcissistic individuals have distinct personality traits that affect how they perceive and respond to various situations. Cutting ties with a narcissist is often a healthy and necessary step for your well-being, but it's not uncommon for them to react negatively. Continue focusing on your own happiness and growth, and consider seeking support from friends, family, or a mental health professional to navigate any lingering emotions or challenges resulting from the past relationship.