Probably a narcissistic personality disorder, or even worse, a malignant narcissist.
These poor souls do not have empathy for others, and they pour incredible energy into creating the “perfect persona” for themselves to inhabit. An example of such individuals is to create the “James Bond persona.” They indulge themselves in everything (wine, women, song, sport cars, fine clothing, etc.) and they feel entitled to everything (not particularly thankful). They need to be the center of attention, and they treat other people like objects. They use others, and cast them aside. They often fly into rages because they feel that they are entitled to poor self-control. They make poor spouses because, sooner or later, they feel entitled to indulge an extramarital relationship, or two.
Psychologically, these people do not introspect (all of their energy is poured into creating their persona). They do not self-critique, and they are overly sensitive to criticism by others. They do not respond well to psychotherapy or other psychological interventions. They are disturbed and “stuck.”
Pray for this family member. Typically, they do not have love for others. If you don’t have love, you can’t know God, for God is love. If you don’t have love, you can’t go to heaven, for heaven is love.
Dismal condition. Only prayer may help them.