OKAY LAMENSE TERMS there is nothing in the world that can make this game a failure you could stick a pipe bomb up mc's ass have his rock hard erection fly through shani's and ains eye killing them. And if the CREATOR of the game wanted it to be so. End credit scene. It's his work im not qualified to say it's a failure or not.
Second point without alluding to anything you say this is my stance so you can't confuse yourself or take what I say the wrong way. Shani losing a fight is not a failure state of the game because such a thing doesn't exist in the first place it's a failure on Shani's side alone you can accomplish this but dodging right or left or hesitating to finish off someone you should finish off. If you fail to win fight you could say, get a rape scene. You could also be saved by a Knight in shining armor be it male or female and choose for Shani to sleep with them through text-based prompt. Or you could choose her I'm really tired better call it a night.
So, if both those points are me agreeing with you then im glad i changed your mind and im happy we are on the same page.