So many different reactions already haha! Frankly, I got lost outside the book during the complex science stuff researching each part of the brain instead of reading
Got to pick up the speed!
In general, I think it's going to be normal that at times some books won't be up everyone's valley. Nothing wrong in that, if you gave it a shot, it's all good
(For example, if we ever get a romance or something similar, I don't think I will finish it either.) Although I know that some books can be difficult to get into, but become amazing later on! Which is why I always give the first 100 pages a shot to see if it's going to get better.