I had a similar, but different, experience. My issue is that in school I approached reading as a task to be completed in the most efficient manner possible - consuming as much as I could, as rapidly as I could, while ensuring an ability to regurgitate on demand. So I never really got to experience the joy of actually reading; in many cases I never even actually thought about what I was reading. So many books have amazing moral tales, metaphors of major events, and so on - yet one can completely consume books and remain absolutely clueless to what you're really reading.

Then as I aged, at some point I ended up getting into classical literature somehow, and now that I actually "got it" and could see and understand what it was saying - beyond the words themselves, it became a complete joy to read. For instance reading "The Republic" in modern times can make one think Plato was a prophet more than a philosopher. Or reading Aristotle's "Politics" can give one such an incredible amount of insight into thinking in the past, society, and even into your own thoughts. Or reading Aurelius' "Meditations" while bearing in mind these were the inner thoughts, never meant to be published, of not only one of the greatest leaders in history, but also arguably the single most powerful man alive at the time. It makes reading feel amazing. Another less well known example would be The King's Mirror [1]. A Norwegian text from 1250 that was a training/philosophy manual, in the form of a Q&A, intended for King Magnus VI. Highly recommended.

Now I see things like middle schoolers being assigned Animal Farm and I just kind of sigh, though it's not like I can think of a better solution!

[1] - https://en.wikipedia.org/wiki/Konungs_skuggsj%C3%A1