Without evaluating the scientific criteria, I would say from personal experience that borderline personality disorder describes certain JWs known to me. Whether is is to be found in the same frequency in the general population is another matter.
Nevertheless the submersion of one's own personality and rights to free expression and lifestyle choices are characteristics of JWs which are promoted relentlessly by them.Those individuals who have been brought up on this mental diet along with fearful threats for disobedience are likely to find themselves intimidated into submission. Given a natural disposition or being with mental health problems would only reinforce the problem.
Whatever is the case; the JW religion destroys people's self esteem and confidence to live a free and fulfilling life as mature individuals.