The map design made it so that you couldn't even see enemies until you were in their line of sight so you had no time to react and kill them. For me, the main appeal of these games is planning out the best way to clear the room but if you can't see half the room it just feels unfair.
In the first game it seemed like you could do everything with melee and guns weren't needed. In this it feels like you have to use guns and I think I would have given the game 4 stars if it made both options viable allowing the player to pick how they want to play.
The story was fantastic but gameplay really brought it down.