Welcome, GrownMidget!
Well, I don't know whether the mental illness comes first and then people are attracted to the religion for stability or the religion causes mental illness. But, I do know there is a lot of mental illness in the JWs.
In my case, there is mental illness in non JW family members. This created a chaotic environment which drew my parent to the religion. But, mental health issues are not cured by religion! So, things were bad in my childhood.
I have also spent time in a psychiatric hospital, but I'm doing very well now. I am glad you were able to get mental health care. I'm in the US and it is very, very expensive. As I read your story I kept thinking, 'How can he afford to keep going to the hospital?' Even with health insurance, my hospitalization cost us a lot of money. It is a constant source of stress for me worrying about getting sick again and being able to afford care. You are so lucky to be able to get all that mental health care! I hope you are still getting after-care and counseling! You need to do it to stay sane. Please make it a priority for yourself!
I, too, grew up as a JW, but I left at age 19. I was disfellowshipped and then reinstated, but immediately quit. I just couldn't imagine living the JW life as an adult. I decided I'd rather be dead than live in paradise with those people!
Then I met my husband and we have been happy together for over 2 decades! It's funny that the story is the same whether in my generation or Giordano's generation or your generation. Find the love of a great partner and life opens up for you!
Best wishes!