The statement that you will never play it makes no sense though since you've confirmed you've never played, and your assumptions about the game are also dead wrong.

It's a sci-fi shooter in about the same way that the Walking Dead is about a family that went camping in the woods. And saying single player FPS's are all boring is the sort of blanket statement that's inherently silly. Doom is absolutely nothing like any FPS made after it save perhaps the original Quake and Painkiller. Any assumptions you have about it based on what other titles are like are irrelevant.