I don't know if this is an ADHD thing or just not liking being told what to do (perhaps some of Column A, little of Column B), but god did I hate reading when I was made to in school. I'll spend hours reading Wikipedia articles on some niche shit. I've spent plenty of time reading books I liked on my own time. But meeting my Accelerated Reader points goals was always a slog, and I've grown to really resent the system.
Demand avoidance is a very common symptom of ADHD. If someone tells me I need to do something it instantly becomes very difficult to accomplish, no matter how much I myself want it done as well.
I don't know how it was in your school, but I feel you on the A.R program. My school had maybe 20 books qualifed for A.R in the library.
It was an absolute slog of the same uninteresting books year after year, and every time they wanted to ask how to make it better, they shrugged off "Get more varied options". We could see the fucking list in the program we went to take the tests in. There were fucking hundreds.
Not everything can be framed in a way to make it easier on everyone, but it's so much easier to teach people when you can frame it in a way they'll enjoy.
Same, I can't read more than a couple of pages of a textbook. But I'll listen to spoken information very intently for hours on end (with an occasional break). Is that common with ADHD?