[armchairperson]

Sounds like the author is getting help already. Starting with the diagnosis. Receiving a diagnosis that you have a personality disorder is not an easy pill to swallow. It also doesn't fix anything, but it helps explain past behavior.

Narcissism may also play a role but as a personality disorder it is incredibly difficult to manage and find support for.

Saying "drop your pride" to someone that you suspect of having NPD doesn't seem any more helpful to me than saying "just stop having obsessive thoughts" to someone with OCD. Besides sounding harsh, this attitude is probably not very useful or effective.