To be fair the soundtracks and the trailers were way to good for the actual game they delivered, not saying it's a bad game, but it does feel like a copy paste, and the landscape is a lot off in relation to the story. If this game were as good as the trailers were this would've been one of the best if not the best game of all times.
I agree, I enjoyed the ambience and the environment but the story was trying so hard to be original that it falls short, and the gameplay is mostly a walking simulator just like people described it.