Seem to me that avoidable NTR is not a genre that is for you. Because the ambiance and the tension, or even better to me, the horror aspect of it is what make this interesting, along the hard difficulty that is often present (and that you already don't like).I prefer to disable it so that it can't happen even by mistake. In fact, any difficulty greater than choosing between several options that clearly indicate which ones should be chosen to avoid NTR is beyond what I like.
If it's hard, people who want to lose will lose easily and people who want the challenge will go trough it (as long as it's fair). It's a win/win situation for me.
But if you want an easy win on the romance path, you get no challenge, no special ambiance resulting of the grim situation, you have a game with not much flavor with 60 to 70% of the scene who aren't for you. I don't get the point of this choice and that's why i think this game is maybe not for you; but you know better and i respect that.