Heart is done the constant power struggle. Why can't Mind just listen to him? He kept a firm grasp on his gun despite the shaking of his hands, aiming at Mind

"Shut up!! I'm tired of you trying act like you're better than me!! You don't know what's best for Whole! Not with how cold and uncaring you are, you- you freak!" Heart shouted, desperately trying to be the one who held the power and corner the other. He needed this victory for his own ego before Soul split him and Mind up