Right let me be very explicit: TOVA or equivalent are basically "play video games for 10 minutes as a part of your diagnosis" like the OP, the kafkaesque part is getting the appointment, and getting them administered, getting the diagnosis confirmed, going through the records and getting the prescriptions, everything around it :) they're actually pretty sophisticated tests, despite their palatability - I think if they had better ones they'd obviously use them.
"Sorry the psych is no longer available today. your appointment has been moved to the next available booking in 9 months time"
Or even better, "We have one available psychologist and they kinda don't believe in ADHD, so they'll see you but not actually grade the test correctly, so you'll have to try again, and as a bonus get labeled medication seeking". Not my experience, but...