Questions: Religion & Spirituality

Some quetions regarding religion popped up today and I am lacking some information about how people came to be non/religious. This question is more for adults, so if you are still underaged do not vote, just comment. Please, refrain from attacking one another in the comments, refrain from dis/proving the existence of a god and promoting your beliefs above others. Feel free to comment further on the way you were raised and how it affected your beliefs or what happened in YOUR life to change that belief. If you converted within a religion (i. e. catholic=>protestant), do not count it as a different religious belief (option D) as it is within the same major religion - but feel free to comment.

I think it took me age 12 to realize. Lmao i really dont remember. Like my mom always told me she was putting the stuff on layaway but only Santa could deliver it from the store. Then she used to tell me, "Dont peek at your gifts under the tree because one by one they'll start to disappear as Santa takes them back". So round age 6, i saw my polly pocket car under the tree through a crack in the wrapping paper. On Christmas day, it wasn't there. I mentioned it to my mom years later but she claims she never bought it. Lies. #SantaIsReal Anyways, one day she asked me to get rid of the cookies and milk after my little sis went to bed. I was like, "why thats for santa?" And then she was like "Oh you still believe in him? I thought you knew that i buy your presents, put them under the tree, and throw away the cookies!" Ahhhh, it broke my heart

How do you NOT believe in heaven and hell? You seriously think that this disgusting world is all that there is? That people (everyone) just died after? That's pretty pathetic and would make your life useless/without a purpose. You think that you exist just to exist? That's pretty narcissistic and doesn't make sense..
say you don't believe in heaven/hell, what do you believe in?
once you wrap your head around how small you are... you're basically nothingness when it comes to the billions and billions of galaxies
you're not even a speck
as significant as you think you are, you're not and long after you're dead, no one is gonna remember you.. so that's it? It's pretty sad.
But humans are small- anything can blow us away in a millisecond
also, what about all of this war, these rapists, molestors, abusers, murderers
all of the nasty people in this planet- you like to think that they're just gonna end up underground like you and that's it?
no punishment? Nothing?
what about all of the filth is this world
and what about the good people

it sounds so realistic to me that there is a heaven for good people where there's no war, bloodshed, filth, rape, murder
all of this filthy shit