two points:
where in the theory of evolution does it say that God does not exist or is not responsible for our current biosystem?
is it then possible that God is behind evolution, even thouhg science will never know it (unless they prove or disprove God's existence, which is practically impossible)
second, what could be more intelligent than a system capable of repairing itself. Evolution by natural selection is capable of this kind of repair. An example is the death of a mutated organism, where the mutation is harmful, particularly if the death occurred before he reproduced. Another example is how life manages to recolonize the earth after every major extinction. The perfect recent example to place 65 million years ago.