Actually, all gods are improbable, but not all equally. Improbability shouldn't be a problem for any real god. There has yet to be one demonstrated to tick that box.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'