my treatment resistant major depressive disorder, which ruined my young suicidal life from age 9 to 34, has almost entirely resolved as a result of treating my ADHD

It's almost exactly the same story for me.

Took me until age 37 and my experience with SSRIs has been BAD.

Losing all those years to depression is still a major bummer for me, leaving me low key depressed most times. And despite knowing all about it and managing it with routines and medication, my ADHD still often feels like a significant disability.