Natural selection and survival of the fittest is not a mechanism to increase complexity. It is only a negation.
DNA
Did not happen by accident.
You have missed out the fundamental bit - DNA is constantly mutating and making changes to organisms. Natural selection is only part of it. Thus the variety of life, and the mechanism of nature's will.
This is children's level science.
To borrow from Richard Dawkins, it's as if a teacher of Latin was constantly confronted with the objection that ancient Roman civilization never actually existed, that the entire universe is only about a hundred years old, and that all the Romance languages sprang into existence, fully formed, and independently, having no relationship to one another. So he's always wasting his time refuting these errors rather than getting on with the business of actually teaching Latin.
