I wonder if they were playing it on Hard difficulty, or not. Seems like they might have just played on Medium, because on hard mode the alien WILL see you. Everything is far more intense on Hard, and the AI of the alien is still randomized, anyways - which makes it something terrifying - Unpredictable.
These two were clearly not immersed into the gameplay, or story enough to give it a decent review. They were probably being spiteful, because of the game's popularity between both fans and critics.