Why do theists like to make stupid thread like this which has been answered billions of times? First of all your comparisons are really poorly made. First you talk about trusted creator and then all of a sudden jump to why don't believe in creator.

Secondly, just because it's small doesn't mean it's easy. (pointing to mosquitoes/flies/other insects). An anatomy is a highly complex system. But technically there are already "man made" insects, more like genetically modified, still with human intervention.

Lastly, if you believe in a creator, why do you stop at God? Why can't God have a creator too? Just because you defined "God" as the creator? Then by right it is just your definition and even worst, unproven.