Yeah, I would be surprised if it were to do with "not liking them" and not "consistently getting them is highly difficult for a person with ADHD" due to their controlled status in most countries. In the US, from what I've heard, it's particularly draconian, where you're only allowed to get a new prescription on the day the last one runs out, and then have to take a paper prescription to a pharmacy where they often don't have stock, so you have to try many pharmacies, all the while being treated as a possible drug seeker by staff.

Maybe this is based off of outlier reports, but it doesn't sound easy for someone with ADHD to keep up a regular supply of medication in the US, and the slightest lapse in medication supply to an individual can worsen that difficulty with their symptoms reappearing almost immediately.

Here in the UK it's a bit more relaxed, but still more difficult and under way more scrutiny and dumb rules than, say, an SSRI medication, which are plentiful and under no scrutiny at all, despite the fact that I had a much worse time on those with worrying side effects and extreme withdrawal symptoms.