I have to be very brief with my post here and will come back to you later,  but I think it’s worth mentioning right off the bat that I think you’re doing a good job so far. not a lot of people would be so understanding of his situation. I wouldn’t jump to the conclusion that his symptoms at one point were truly schizophrenic if that’s any consolation. symptoms of depression can present in strange ways. I myself was diagnosed with mild OCD several years ago on  top of the major depressive disorder I’ve had all my life. it took two traumatic events I had in quick succession which triggered my obsessive thinking and it fried my brain. It took a few years of introspection, cognitive behavioral therapy and learning from Buddhist ideology to help me check my intrusive and irrational thoughts. I’ll  summarize for now by saying: “don’t give up hope, I think you’re on the right track!”