Yes, it is not uncommon for narcissists to selectively forget or conveniently overlook positive memories or instances when they received consideration or support from their victims. This behavior is part of their complex psychological defense mechanism called "cognitive dissonance."
Cognitive dissonance occurs when there is a contradiction between a person's beliefs, attitudes, or actions. In the case of narcissists, they have an inflated sense of self-importance and a need to maintain their self-image as superior, powerful, and flawless. However, deep down, they might have insecurities and fear being exposed as inadequate or imperfect.
To cope with this internal conflict, narcissists engage in various defense mechanisms, including selective memory and revisionist history. When faced with evidence that contradicts their self-perceived greatness, they may mentally block out or distort memories that could cast them in a more vulnerable or less favorable light. They may also rewrite past events to suit their preferred narrative, portraying themselves as the perpetual victim or the benevolent hero.
By downplaying or ignoring instances when they needed consideration or support, they can maintain the illusion of their superiority and avoid confronting their own flaws or vulnerability. This cognitive dissonance helps protect their fragile ego and enables them to continue manipulating and exploiting others to satisfy their emotional needs.
It's important to understand that dealing with a narcissist can be extremely challenging due to their complex psychological mechanisms and manipulative behaviors. If you find yourself in a relationship with a narcissist, setting boundaries, seeking support from trusted individuals, and considering professional help are crucial steps in protecting your well-being and mental health.