The game is about getting another chance at life, going back to the past to avoid mistakes. Why would you add bad ends? It's supposed to be a harem game; every girl wants to have sex with the MC. What "bitter taste" is there? Totally inconsistent development, I regret supporting this game now.
Legit. It's not as if the MC's a god who knows every cheat code in his new life. Granted RNGeusEx could do it for plot convenience, but by using the fact that this is another chance in life to avoid mistakes doesn't make a good argument. Saito's not a miracle-maker. It doesn't also mean easy success, as you said. Dunno why you're getting downvoted. Might compromise and just toggle NTR stuff off for the snowflakes LOL. Might kill them because their imaginary "waifus" are getting fucked by other men.