I don't believe God or an afterlife doesn't exist, I just don't believe it does. Personally, I feel it's a lot more reasonable to not assume anything until there's a reason to, and what does assume there's an afterlife do for me in life besides make me try to live a certain way to get in? I already try to be a good person without that need.
I've had encounters with unseen shit in my living room so I'm not here to write anything off. All I can say* with certainly is I'm not sure about anything other than if there's a god then it's a cunt for the world it made where kids can get painful life sucking diseases while perfectly healthy and morally corrupt get multi millionaires for parents. Outside of what I can see as visible evidence, I cannot discount or accept.