No atheists in foxholes, anon. Anyone who claims to know for a fact that there is no God has yet to experience the true potential of pain or be genuinely afraid for their life. When that happens, you will say anything to make it stop.
It's a mistake to say that waifus don't exist. To be more accurate, waifus don't have a physical presence. It's like loving someone who has died. You wouldn't say that someone is no longer real just because they died. You can't talk to them or interact with them, but they don't disappear completely just because their body is gone. They still exist in pictures or videos or stories and still have the ability to influence us, make us feel or change our behavior, just as waifus do.
The blase way you brush off concepts that are a reason to live for many tells me that you're very young and this will be wasted on you, but I hope someone else will appreciate the thought.