it's useless
Es inútil que busques el pastel, porque ya me lo comí.
It's useless to look for the cake, because I've already eaten it.
But there's no point in stopping him from doing it.
— Perfectos desconocidos (2016)
Es inútil discutir con un tipo tan idiota.
It's pointless to argue with such an idiot.
Es inútil hablarle cuando está enojado.
There's no point in talking to him when he's angry.