from the way you say it it seems like you want everything to end badly, this whole pessimistic vision, everything in shit has to end, then there are several things, either you are a seer or you collaborate with Fujino, either you're Fujino disguised as Inferno or you're going crazy xD
It's only logical there's no passion about it, first have you ever seen a NTR story with a happy ending? Sure as hell i didin't.
NTR game you play to lose either way.
About this story in particular do you really think anyone deserve a happy ending? Sorry to break to you but no even Kirito deserve a happy ending, he was manipulated, cheatead, raped, drugged, humiliated by his own choice.
You can say he didn't know because this or that fair, but what did he always knew and allow to happen his GF being all the time with a dude even alone with him in his flat, and never had said a thing to her.
I'm just a realist i've play this game with the knowledge that everyone in this story is piece of shit and i'm cool with that, i'm not fantasize about a happy ending in this scenario, now you tell me who is crazy