The first time I went for a diagnosis I was made to sit the same QbCheck test, which was then used as the entire justification for why I couldn't possibly have ADHD despite every other aspect saying I did. Apparently 30 years of having to sit at a computer and do a task in order to eat and pay rent means that I can sit down for 20 minutes and do a task at a computer.

I'm still quite bitter about this because it then took me another two years to work up the motivation to go get retested (this time somewhere that doesn't use snake oil), followed by an additional year to work up the motivation to sort out coordinating with my GP to get on meds. That's three years I could have been a functioning human being.