With AI this non-existent and gunplay this bland and meaningless there are only 2 options:
1. They are playing on super easy to "show off" the game, in which case they don't think fighting enemies and shooting guns is an important part of the gameplay in a game where you fight enemies and shoot guns.
2. They are _not_ playing on super easy. In which case there is no gameplay at all.
Why is the player in this video sneaking around or using clever tricks when the deaf and blind enemies, after you manage to alert them, stand directly in front of you and miss repeatedly at midrange?