It's like Dune, The Forever War, 2001 or even The Gunslinger. They all have a satisfying ending. I'd keep going though.
The book is in a different style because the protagonist is different. It'd be really friggen weird if it read the same. It absolutely does rely more on mood than Annihilation but I wasn't bored.
It's one oppressive book though. I couldn't read it at night time with just a lamp on.
I say power through if you have to because the pay off is worth it.
Borne rocked.