The Scale of the Universe as Evidence for Naturalism?

In his book, The Non-Existence of God, philosopher Nicholas Everitt provides the first detailed analysis and defense of the argument from scale for God's nonexistence. Everitt formulates his argument as follows:

(1) If the God of classical theism existed, with the purposes traditionally ascribed to him, then he would create a universe on a human scale, i.e. one that is not unimaginably large, unimaginably old, and in which human beings form an unimaginably tiny part of it, temporally and spatially.
(2) The world does not display a human scale.
(3) Therefore, there is evidence against the hypothesis that the God of classical theism exists with the purposes traditionally ascribed to him.