Have you ever played a video game & encountered a challenge or mission so unrealistically hard, makes you so unimaginably frustrated? This trope makes Nintendo Hard look as soft as tissue, this makes Classic Video Game Screw Yous look like a reasonable challenge, this trope goes beyond The Computer Is A Cheating Bastard, beyond Fake Difficulty! If you've encountered a moment like this, you've encountered Non-existent Difficuly! Might count as a Sub Trope to Fake Difficulty.

Example:

The 3rd & final Bowser battle in Super Mario 64 could count as an example of this to a lesser extent.

I Wanna be The Guy could be considered a Non-existently difficult game.