I think it comes from the fact that you put that deadline on yourself. I have never been able to enjoy a book if there was one on me.
You're probably just reading the wrong books.
Find the kind of book you like and read more of that. Forget the deadlines for a while. Don't force yourself to finish a book you're not enjoying.
Just because a book is a classic doesn't mean you are required to enjoy it. As a writer myself, who had force many a classic, I stopped trying to care about them after a while when I enjoyed junk fantasy novels more.
You really have to find something that interests you enough to connect with the plight of the characters. It is a challenge for a writer. How do they interest you in an android and a huma's relationship? If you can't empathise with the characters then it makes for tedious reading.
So what interests you? Are you really that into fiction? If you are then is it sci fi? Horror? Maybe not. For me I like non fiction. I like to read about people and place that I feel I can connect with. Reading fantasy or crime novels doesn't light a spark in my imagination.
What types of books have you enjoyed in the past? Did you love Wild Swans? Do you find yourself browsing the adult fiction aisles at the book store, or do you discover your fingers paging through the graphic novels before you put them down and wander off to find something classic like Dickens?
Long story long, find a subject that interests you and try that.
What are you interested in reading? Try some non-fiction, try some more contemporary literary stuff. Try some translated work from South America. It's a big world out there...
You need to figure out what it is you're looking for in a book. Unfortunately, the only way to really do that is to keep trying new books until you find one that really clicks, then you can figure out what it has that the others didn't - might be a certain type of protagonist, or a certain pacing, or some humor, or something else. Maybe a thriller or mystery (even within a scifi/fantasy setting) might work. At least to get you started.
I'll suggest Altered Carbon by Richard K Morgan - it's fast-paced cyberpunk, violent, with a mystery to solve and lots of action, but also some interesting ideas running through it. And it's going to be a Netflix series very soon.
Both of those you mentioned are well-regarded, but certainly not for everyone. You might explore some other genres and nonfiction - Bill Bryson's A History of Nearly Everything, Shogun by James Clavell, Lonesome Dove by Larry McMurtry, Burglars Can't Be Choosers by Lawrence Block.
What have been some books that you've *really* enjoyed in the past, if there are any that you think hooked you. There might be something particular that you liked in addition to the premise/world and setting, and you could look at other books similar to them in writing styles, worldbuilding, etc.
I find that there are very few books that appeal to me - I always assumed my tastes were just my tastes and that was that. But maybe I need to cultivate them?
I feel that when a good book DOES come along, it's a true pleasure. I feel that good books are just very, very rare.
Read something published more recently. I found it somewhat refreshing after reading a bunch of classics.
I would agree with Do Androids Dream of Electric Sheep.
What I've found is sometimes it's just not time for me to read a book yet. If it's not holding my attention I'll put it away and come back to it in a few months. About half the time I end up loving it (Cloud Atlas is a great example).
I felt the same way about said two books, so relax it's not just you. Personally, "Flow my tears the policeman said" was way better and shorter, also "Through a scanner darkly" were much more readable and moving. One of these days you'll pick up a book that really connects with you and you'll be drawn into reading again. I have always felt that DH Lawrence, Thomas Hardy, Alice walker, etc. write just for me. Stop reading for a while, don't Saturate your palette with too much material, watch more movies, draw, make shitty art..read when you feel the need to otherwise it becomes unwanted.
There's a sense in which a reader 'buys into' a book. I think this is why series are so successful. Once you accept a writer's world, their word choices, etc, you get comfortable in it like a pair of shoes. Take Grisham, for example. All his earlier novels have this feel.
Give yourself however much time you need for this to happen. And if a book or writer doesn't fit, try another.
An example I can provide in a different medium is Mass Effect: I loathed the gameplay of Mass Effect and despite my best efforts I COULD NOT stand the slog. I completed it because I wanted to set up a continuity for the sequel, which had much better game play, but by the time I'd sunk 50 hours into ME1 I had such a loathing for the franchise I couldn't complete the other two.
Set yourself a bench mark: if you aren't hooked by the time you're through 25% of the book's chapters, reset your timer and accept the book isn't for you. Finishing anything just to get it done never feels satisfying.
I also dunno how fast a reader you are, but 2 weeks seems like a short amount of time for a decent novel unless you have LOTS of free time, so if all your down time away from work and responsibilities is a book you're just not into, you're really not relaxing when you need it most.