I mean because it's not that simple.. theres porn with getting your dick cut off etc how's that not worse than getting your girl stolen?

I'm not trying to start a competition who can come up with a more disgusting thing. I understand why people don't like their girl getting stolen. I simply find it interesting that some guys tend to place ntr above rape, murder whatever. Personally I think there's worse things than being cheated on. Does that make sense? If the question was that simple as you're implying it really wouldn't be discussed in my opinion
Holy shi tzu... what kind of porn have you stumbled upon?
Also yes apparently getting your girl stolen in game is bad... Which I would understand if there was a development to it. Like you start the game, do whatever for some hours, be cute, get the girl, and then suddenly you start noticing the weird stuff and then oh no she's getting gangbanged in an alley and she loves it! But most games just start up with a relationship I don't care about and shit happens.
I'm supposed to care about the cheating of fake people I didn't even have the chance to be attached to? That part I can't quite understand.
Also... there are many variants to it. Maybe the guy is an ass, maybe she's a bitch who gets rein in by the "bad guy" I don't know. Does that hit the same way?
Imagine one of those... romance animes where they take 3 seasons to hold hands. Then imagine that after all that cuteness one of them cheats on the other super hard and doesn't care. Now... that would absolutely be awful, but only because you get to see the cute part before the NTR. THAT I can understand.