Pathetic argument, and a pathetic attempt to cover your own stupidity. Read a book for once, you'd know Chief is a lone wolf. Co-op is none cannon so that argument is void, he has marines with him for less than half the time, and he never pays them any attention, usually doing his own thing the way he sees fit, and they usually die, and he doesn't care. Being around a bunch of people you don't know doesn't mean you want them with you.