I've never been aware of being anything else, so answering "no" makes little sense; true though it may be. Unhappiness in my life has nothing to do with atheism, mine or anyone else's. Hope there's something useful in that lot.
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.'