An important distinction for laypeople to understand about Psychiatry is that anything classified under the "Personality Disorder" category is essentially hopeless & intractable.
1) Most people suffering from a Personality Disorder will forever be in denial that they have a Personality Disorder
2) People in denial will never seek treatment (or will never seek treatment for their actual problem)
3) Even if they did seek treatment, there's no pills to fix them
4) In theory, a very skilled psychotherapist with specific PD expertise, a willing & extremely motivated patient witn infinite resources & time could make some progress. But this is mostly cope.
5) The reality is that most people with PDs are so self-unaware, manipulative, toxic & repulsive that even in a vacuum, most professionals would rather neck themselves than treat them (which they really can't even if they wanted to).