Perspective on cluster-B personality disorders?
I have close family who mainstream Western psychology would diagnose as having cluster-B personality disorders (either Narcissistic Personality Disorder or Borderline Personality Disorder). They are often volatile, extremely manipulative and outright abusive, and psychologists describe them as difficult to impossible to improve with therapy, because of their rigid coping mechanisms that are hard-wired into their personality, their inability/reluctance to self-reflect and share honestly, and tendency to be callous to those around them, even long-time family members.
Do the Buddha or other sources speak about the states that psychology labels as these disorders? Like in what makes their personality makeup different than non-disordered people, and how they interact with the practice. What I found so far were one remark in passing by Thanissaro Bhikhu and a talk by Ajahn Sujato on narcissists, both had the geist of sardonically making fun of narcissists as extremely difficult people that aren't worth interacting with, and I'm interested in deeper analysis.