Worst atheistic argument?

[Darwinian]

So, it's "Metaphysic" is that there is only a natural reality, it's "Epistemology" is the scientific method tempered by Logic and reason, and it's "Ethic" is the majority in a society rules.

It's got the three major components of a worldview, therefore it is a worldview.

Get it now?

No. Whilst these things may well be what many atheist hold to it has nothing to do with atheism itself. Atheism is simply the disbelief in something someone else believes, in this case god or gods, nothing else.