Do some study on Narcissistic personality disorder. Makes it clear why there would be no resignation, explains the rallies during a pandemic, explains the terminations of "disloyal" underlings, explains a book written by Mary.... etc.
You know, your explanations are speculations.
Plus, psychology labels retard diagnosis. Everyone is a unique individual. Hence multiple terms and exceptions as one focuses on identifying a proper course of action. When able, new terms are formed. For example, TDS.