“Because their fragile egos are hypersensitive to perceived criticism or defeat, people with NPD are prone to feelings of shame, humiliation, and worthlessness over minor incidents of daily life and imagined, personal slights,[10] and usually mask such feelings from people, either by way of feigned humility, or by socially isolating themselves, or by responding with outbursts of rage and defiance, or by seeking revenge.” https://en.m.wikipedia.org/wiki/Narcissistic_personality_disorder