>>713870367If you wanted the good ending than you should of gone for the good ending instead of the bad ending that you deliberately wanted to do.
And the game isn't punishing you for doing Genocide. Genocide rewards you with cool bossfights after admitting that you only care about the game as a thing to play, while screaming for anyone without that mentality to turn back at every point.
So by doing Tre Pacifist after its punishing your for treating it like a series of boxes to check and then thinking you deserve the option that was meant for people who care about the setting and characters as individuals beyond a toy for ones enjoyment.