I'll take a crack at this while I do not profess that I am atheist...yet. I find the hardest part for me to swallow is a believer saying they prayed to God to help them decide what job to take, find their car keys, get a promotion, while there are literally MILLIONS of people who starve to death while praying to God for help. There is no rational and loving explanation to say that indeed God helped someone do something so meaningless as get promoted, while allowing someone to die.
I will give an example of our CO talking about the power of prayer. In the 90s a little girl prayed out loud when she was about to be killed in the genocide in Rwanda. After her prayer they let her and her family go. He was pointing out how the power of prayer caused Jehovah to save their lives. So I looked up and noticed in JW literature, over 400 witnesses were killed in the same time period in Rwanda. I am sure everyone of them was praying to Jehovah, and their prayers went unanswered. So why did Jehovah decide not to spare them?
I believe most of your questions are irrelevant to an atheist since you are asking them to pretend to believe in something that they say they do not believe in.