I felt the chore vibe from this game as well. Got up to chapter 7 but got bored. I gave it a fair go, tried to let it grab me, but every level is very samey and is marred by too much ammo/note hunting, which staggers the flow of the game and prevents from being properly submerged in the atmosphere. Doom 3 suffered this problem as well with its endless amount of PDA's to find.
I wish developers could spend more time on proper cinematic sequences to explain backstory rather than relying on the lazy method of using notes. Notes can be good, don't get me wrong, but not when there's like 500 of the things littered around the place.