I used to read fairly voraciously as a child; nothing like the kids who could devour a Harry Potter book between sunrises, but a respectable "novel every 2-3 weeks", somewhat above my grade level.
I can remember almost the exact instant I fell off: being dissatisfied with a particular turn in a YA novel in 9th grade, and the odd moments that had been filled with page-turning suddenly became designated for sketching and doodling (at the height of deviantArt's power).
I don't think I finished a single class-read novel in high school; hated Wuthering Heights and beloved (on vibes) L'Etranger alike are a blur. (Still aced the AP exams.) I knew it was really over when I had to drop a classical literature course in college because I couldn't keep up with the readings.
I've a few dozen unfinished books in the ~15 years since, and less than a dozen finished ones. 1Q84 has been a multi-year odyssey.
I've introspected about what's gone "wrong". My reading speed is quite slow, and has never progressed, which I think is a major part of it. I often become distracted, stopping a little too frequently to mull things over - really, squaring the reading with my preconceived notions, which was not as much of an issue when I was younger and had fewer of them.
I also stress over finding time to begin reading in the first place, and about being disconnected from reality when I'm in a book's headspace.
I'd love to know if anyone's had a similar experience and can boast a "recovery" (and how they managed).