I have a similar issue. I'm not as productive in my reading habit as I'd like to be, because I constantly bite off more than I can chew, almost exclusively prioritising the most difficult works (i.e. trying to have Gravity's Rainbow, Ulysses, and The Man Without Qualities going simultaneously with a few pages of Proust tossed in here or there, as well. For the record, it doesn't work. Saying that, I'm sure English majors have found a strategy for this sort of thing.)
It's partly for this reason I only managed to read Crime and Punishment in its entirety for the first time at age 30, despite my first attempt being at age 18. I still haven't entirely read Anna Karenina and/or The Brothers Karamazov. I've gotten through about 80% of the former and the first half of the latter and not due to lack of enjoyment but rather to intellectual exhaustion. I made it through The Red and the Black in French though about three or four years ago. I suppose there's an element of FOMO in all this. Finish this book at hand, but s**t what if I never manage to properly read that book over there at some point.