I found that therapy certainly brought out real stuff, but was more fantasy-based than not. Most of the time it was about as relevant to real-life as acting in a play.

My main point was that failing at one of these pseudo-relationships hardly seems compelling evidence for some personality "disorder", nor confirmation of anything real necessarily.

eta: As for what is supportive or not, seems like challenging professionals in a position of power is more supportive than affirming their dubious diagnoses and pronouncements, but not everyone sees it that way.