After thousands of conversations with atheists and agnostics the overwhelming objection I see with the Christian God is an objection surrounding morality.
Hard evidence, science, biblical errors or inconsistencies, are all flimsy and debatable.
I cannot speak in depth to your personal objections with God as it appears the OP is referring to Islamic beliefs.
At 12, do you believe you have given due diligence to investigating theism and applying logic and reason to determine what best explains many of life's big questions?
I would challenge you to do so.
Hard evidence, science, biblical errors or inconsistencies, are all flimsy and debatable.
I cannot speak in depth to your personal objections with God as it appears the OP is referring to Islamic beliefs.
At 12, do you believe you have given due diligence to investigating theism and applying logic and reason to determine what best explains many of life's big questions?
I would challenge you to do so.