I reject a god because every organized religion has creation stories that show some amount of not knowing what's going on outside their borders. For example in Christianity you'll find that they believe lions are the strongest animals yet in Native American religion they like to thing of grizzly bears as the strongest, partly because North America didn't have lions of the same sort in Europe and Europe only had weaksauce brown bears. Surely if one of their gods created everything and knew everything, their religious text would show some acknowledgement of animals found in other parts of the world. Given this, to me that clearly says that the religious stories were entirely written by people and people are generally unaware of what happens outside their area so that means the stories could not possibly have been written or delivered by gods.

This idea that people don't know and never know what happens outside of their area can also be demonstrated with dank memes. Did you know that China has their own dank memes? If the people of reddit were to pick the spiciest meme every subreddit would have their own and every country would have their own.