Are you implying that the author did not get a professional diagnosis and is merely comparing himself to people who have ADHD?
When I was diagnosed with ADHD, the disorder did cause me significant problems. Over the years I have managed to do a lot better, where I can now relate to the state the author is in (just the ADHD part, I do not suffer from depression).
What I'm saying that if "it's not so bad" is reasonably true, the various disorder labels don't apply, perhaps they did and do no longer, perhaps they never did. A "cure" for ADHD looks like "it's not so bad any more".
When I was diagnosed with ADHD, the disorder did cause me significant problems. Over the years I have managed to do a lot better, where I can now relate to the state the author is in (just the ADHD part, I do not suffer from depression).
I would now say it’s not so bad too.