https://estd.org/narcissism-consequence-trauma-and-early-exp...
“Narcissism tends to emerge as a psychological defence in response to excessive levels of parental criticism, abuse or neglect in early life. Narcissistic personalities tend to be formed by emotional injury as a result of overwhelming shame, loss or deprivation during childhood.“
https://www.farahtherapycentre.co.uk/blog/narcissism-and-the...