God is supposed to be omnipotent. You know, all powerful, almighty. The great-making characteristics of such a god are the paragon of abilities. He could achieve anything at the metaphorical click of his fingers.
So what the hell is Satan still doing hanging around? Well, of course, he doesn’t exist either. But supposing you believe that both God and Satan are real entities. Well, then, you’d be making no sense at all.