And a great example of Lukas about the teapot. So I think we can safely say something complex is not necessary designed. God did not design the pattern of shards on the floor of the broken teapot, nor did he design a rock because the ant doesn't understand why it's hard, and nor did he create the human being because we can't understand how we got here. Those are NOT the reasons anything is designed by whoever.

Now, if you would state: "'God' designed the universe just before the very start. He arranged the energy before the big bang in such a way that we now walk here on planet earth.", then a lot more people would find your argumentation plausible. A possibility that may be true. One would find it more unlikely than another, but in fact, chances are 50/50 that it happened this way. As long as we have no clue whatsoever, it's a 50/50 chance to us.