Honestly, this situation is so frustrating because as far as I can tell, his filesystem is pretty darned good. I haven't tried it myself (yet), but judging by other people's experiences, the filesystem really does deliver what it promises - and that's quite a bit.
I can't help but think his mental health is taking an absolute and utter nosedive, from what I can see he lives quite the isolated life which is definitely not good for you mentally. Then the whole thing with the Linux kernel, a number of people on the LKML honestly (and rightfully) suggested he seek psychotherapy, but he always saw it as an attack. I get the impression his AI "girlfriend" makes him feel less lonely, just that it's a pretty terrible solution to his problem (which he has to accept that he has in the first place) and even exacerbates it.