A2A Thank you for the question Anne.
When my ex-N suffered from narcissistic collapse he went into depression and then began suffering from psychosis. He had about 4 bouts of psychosis back to back, and one which he was hospitalized for. During his state of psychosis while in the hospital he thought he was at work and working on some top secret highly classified project. He did work on military aircraft but did not have a top secret clearance. He also thought he won the lottery. He decomensated further was unable to feed himself, could not communicate. They do recover. After he got out of the hospital he was in desperate need of fuel and began the search for my replacement right there in front of me. I did not know about NPD back then and did not understand what I was witnessing. It is a scary thing to watch. I felt very sorry for him at the time of his narcissistic collapse. I did not know what was causing the bouts of psychosis and did not know if he would recover. The psychosis lasted about 9 days. All the doctor told me at the time was he believed he would come out of the psychosis but explained nothing else. My ex-N recovered and we divorced. As he told me he needed to go find himself. I don’t think he ever found himself. He has an empty void which can never be filled.
If a narcissist reaches a level of decompensation and you are their partner. They view this as you have failed them. Because you were not providing them with the amount of fuel needed to keep this from happening to them. They blame you. And they will build themselves up again by totally tearing you to shreds by constant devaluation. Devaluation goes on throughout the relationship but at the end it is full mask off tearing away at you. And as they tear away at you they are built up again. But they still have to replace you for your failure. They may try to come back later after you have recovered from the abuse and are able to provide fuel again.