I hear you, it is more of a glimmer of a thought than something that I have worked out well, and I gladly welcome your explanation as to why I am off-base!
It feels though that the elaborateness of this self-identity is a sign that the person is actually quite typical, but somehow their ability to perform critical analysis has been turned viciously against their own behavior because of a few early formative experiences becoming the archetype of all socialization.
In short then it is the scrutiny they are subjecting themselves to that is the problem.
Their commitment to furthering the development of this self-identity is of course all good, free to choose their lives as they see them. If they are in fact in social pain about the state they discover themselves in I would suggest to them that what they consider to be discovery is instead creation. And creation carries no inherent obligations, and they are much freer than the story they have learned to tell would permit them to admit.