That is a very simple summary that does not convey any of the actual horror (body, psychological, and jump scares) that occurs in DS. Reading the plot will spoil the twists, but is not the same as playing the game and reading thru the in-game journals, experiencing the cut scenes, the ultra vigilance the game instills, or the aura of dread from every corner of the ship as you walk thru it.

It's not. Everyone saying it is hasn't actually read cosmic horror, and don't know what it actually is.

Which is something that can't accurately be conveyed from one person to another, you just have to read it.

The nature of cosmic horror means that no visual representation can ever be accurate.

Though maybe you weren't referring to Lovecraft when you said psychological horror?

Oh it is

It’s overarching plot is about a marker that slowly makes people go insane, the shooter is just a VERY small portion of the game.