I remember when a cult leader, a true narcissist in his early eighties, was descending the stairs in his mansion looking down upon his dwindling number of followers. When seeing how few people were down at the bottom of the stairs to bow to him, he stumbled and missed a step. When he stood up, he blamed everyone in the room for his having missed the step. He said it was due to the negative energy in the room, and it was the evil left by the people who had abandoned him and abandoned the cause that he had lost his footing. That is a true collapsed narcissist.
It is a sad life, an emotionally empty and disconnected life, and one of self-imposed victimization, but it is hard to feel sorry for someone like this, because they spend whatever energy they have lashing out at everybody else around them, thereby, and unknowingly, maintaining their absolute isolation.