Who else peaked in life at around 15?

I had a head full of hair, was athletic, had a good group of friends and plenty of naive dreams about the future. Heck, I even had a girl ask me out once. Great, right? Fast forward to now I'm 29, bald, look like a cancer patient. 0 qualifications or skills. Clinically diagnosed mental illness. Been fired from every single job out of sheer incompetence or due to social ineptitude in general. Can't talk to people or relate to their interests/problems at all. Still living with my parents who don't understand mental illness and constantly pressure me. Yep. What about you guys/girls?