You think there isn't learning and pain on the path that atheists walk? When you don't have a magic book and magic friend to turn to, your entire life is first-hand discovery, exploration, trial and error, learning, meditating, seeking truth, re-seeking truth.
Marcus Aurelius may have been questionably spiritual, but he's close enough to an atheist to make the point better than I could.
To brashly and stupidly equate atheism solely with hedonism is pretty sophomoric and tired at this point in human history man.