I've been pretty sure I had ADHD for decades, but I always took it as "So what? Knowing you're broken doesn't do shit." Only treatment I ever saw that wasn't therapy was my little brother taking Ritalin and he turned into a zombie.
So I did a LOT of therapy, and it never helped.
Then people I know (and we chaos goblins do congregate, especially in tech), started taking Lisdexamfetamine (Elvanse/Vyvance) and I saw it change their gods damned world.
(cont'd...)