I do not believe 'AI psychosis' is an actual thing.
*Il outline how briefly: mutate the model 500 times, give 1/500 of your user base a mutated version of the model, and save the top 5 of these model, ranked by how often the users did something, over the course of a week. Repeat for a year, passing the top 1% of these models onto the next round. This is the simplest way to do this and I can think of better ways to do this. I don't even work on this sorta thing; its 100% obvious to the AI labs how to do this better