There are at least 2 places in the Bible (one in Isaiah) that tell us that in the next life we will never remember any of this. It will never come to mind.
So, it is not that you don't believe in God. Rather, it is that you are angry with Him for not judging things according to the way you think.
Don't throw away eternity for yourself. Having the pleasure of some deep anger against God in this life (though I don't see where there is pleasure in anger), is not worth losing your salvation for eternity.
Rather, humble yourself, and ask God to comfort you and bring peace to your mind and soul.
''Rather, it is that you are angry with Him for not judging things according to the way you think.'' Actually as you can clearly see from my example above, I'm not angry or happy, it simply makes no sense and it's not fair.
What makes it unfair is the unfairness of mankind toward God. God gave His all in Jesus death on the cross. He did it to save mankind. But here you are, not only accepting the imperfection of being sinful in the first place, but extending your imperfection to the rejecting of the great sacrifice Jesus did to save you. You ain't fair. Certainly not to God.
God sacrificed himself to himself to forgive us. Another nonsense from the bible right there. It makes absolutely no sense and we are not even saved, we are still here, aren't we? Why did an omniscient and all powerful god need to sacrifice his ''son'' to forgive humanity? Why not just forgive us? What is there to forgive anyways, he already knew everything that would happen.