Yea, only one guy talked with red to throw him out. He "loves" the hero and wants her for himself, also he believes he can take over useless work of MC. He can't, partially throught ignoring problems, partially through lack of multitude of abilities that red has.
So, after some fighting the party breaks apart. "I though this party was the fastest way to defeat the demon king. You guys suck, so i'm going alone".
Hero was left alone with this retard and her vocation of a hero forces her to fight constantly. She can't even take a brake to look for her onii-chan...
I'm suprised i remember that much. I've read it before manga started.