Chris Mitchell, in his reflections on C. S. Lewis' Mere Christianity, Lecture 2: Christian Belief Part 1, mentioned that Lewis' criticism of Atheism was that it is 'too simple'.
An excellent summary of atheism's view that all of our life and experience and the cosmos we are in 'just is'. And that's it.
The human condition, the greatness of the human soul, and its great failings. Well, they just are. That is. The earthworm view of life, to borrow Ellis Potter's term about people 'who don't know much about art, but they know what they like.'