How can you claim this?
Burden of proof (philosophy). Atheism is just finding the many, varied, and contradictory claims of theists, unconvincing.
We have the unfathomable complexity and virtually unlimited capabilities of the human mind.
We have the freedom to contemplate:
The presumption that we are just an accident of nature.
Or that we are evidence of a creative force beyond human understanding.
Firstly, we have plentiful evidence that humans evolved naturally. Secondly, this is basically the same old "wow, isn't the universe amazing, complex, and unexplained - how can we explain it? I know, we'll posit something even more amazing, complex, and just as unexplained to 'explain' it." Even you must see the tiny problem with this, no?