So you judge who felt as you put it 'real love' by what nsfw novels he/she enjoys, nice - just nice...
Also not everyone is as overattached to the pixels on the screen, could also argue with the 'man just wanted to be loved' as that was just another example of a pushover character that swims whenever river takes him. But thats another story.
So that justifies, in your tiny mind, that a person gets brutally treated like trash and then straight up merc'ed? Yeah, not feeling bad for spoiling this PoS game. Normally I don't mind NTR, as some people said, you project that you are the person doing the cucking, not the cuck.
Here's a reason why that shit is hard to do in this shit game: YOU SEE EVERYTHING IN THE CUCKS PERSPECTIVE!
I would have genuinly not minded the entire cuck thing, though yes, I think people who try to cuck people in RL should be shot by the offended husband, but as was stated before, this is a game, so whatever, pixels. No actual person was hurt. But the game was so bad, that it actually offended me, forced to watch this depressing story of a man whose own parents couldn't bother giving him a actual name, stuck in a dead-end job, with a good-for-nothing wife, who then is brutally murdered in the end.
Also, in most of my NTR games, I usually like to have a way to avoid it if possible to see the boring end, with a happy marriage, where everything works out, only to fuck it up in my next playthrough to see how twisted it can get. This is a complete railway with next to no choices. And the worst insult of all:
YOU ONLY SEE LIKE HALF OF ALL THE IMPLIED SEX THAT WAS GOING ON!
So, here is my creative advice that doesn't boil down to 'this game sucks':
1. Actually let us see the sex going on, perhaps switching between view of the cuck and the cucker.
2. Lighten up the ending, like HOLY SHIT! That depressive ending killed any boner I might have acquired tediously with the sparse amount of porn and the massive amount of depression fuel you threw our way.