I have also stated my alternate theory many times. Briefly: species are tremendously adaptable. They have a large gene pool which enables them to adapt to different environmental circumstances. This is how they were designed by their creator.
But if species were designed at random by the creator, where are the 3 billion year-old human fossils? Where are the flying primates? Where are the underwater ant colonies? Where are the ground dwelling fish?
If species are created at random, why don't these exist? Don't tell me you're waiting for evidence of these to be discovered? That's what evolutionists do.