Disregarded. You probably know that the phrase "not even wrong" means neither the term wrong nor right apply. A claim has to be falsifiable to be shown to be correct or incorrect, neither of which is possible for the unfalsifiable.
I'm not sure why you've included this. I haven't been discussing ancient views, just modern god claims and how they should be viewed and evaluated according to the principles of reason applied to evidence seen in science and law, for example. I don't consider any god claims ancient or modern factual. As I said, if they're unfalsifiable, they are neither correct nor incorrect.
In an episode of Seinfeld, Jerry and George are arguing about whether Superman had a sense of humor, since although he smiled, he didn't laugh and wasn't witty:
Jerry: I think Superman probably has a very good sense of humor.
George: I never heard him say anything really funny.
Jerry: But it's common sense. He's got super strength, super speed. I'm sure he's got super humor.
George: You would think that, but either you're born with a sense of humor, or you're not. It's not going to change even if you go from the red sun of Krypton all the way to the yellow sun of the Earth.
Jerry: Why? Why would that one area of his mind not be affected by the yellow sun of Earth?
George: I don't know. But he ain't funny.
Which one is right and which is wrong? Neither is either, because they're making unfalsifiable ("not even wrong") claims.
Others have already said this, and I agree with them: The god of the Old Testament flooded the earth. If that never happened, that god doesn't exist. Perhaps other gods that never flooded the earth exist, but not that one. In the past, people have argued that we are misunderstanding what the Great Flood was, and they redefine it. But that doesn't rescue the god that allegedly drowned the earth. It presents a new mythology worthy of a new god or pantheon of gods that didn't drown the entire earth.
You're confusing biological evolution (the natural selection of genes) and cultural evolution (the artificial selection of memes).
What's ingrained in humanity is children engaging in magical thinking and viewing the father figure, whether the head of the family or tribe, as powerful, intelligent, judgmental, and to be obeyed. The priesthood exploited these tendencies and carved out a great niche for itself - no hard labor, work indoors, supported for life by people bringing them money every week to tell others how to live, and instant respect and social status. But notice the need to maintain these immature ideas through adulthood, which is especially difficult in a world trying to educate children to think critically. Religion is dying where education flourishes, which is your evidence that there is no god gene. Just stop telling susceptible people about gods, let them mature outside of religion, and they have no need for either.