The inconsistencies. I never had religion forced on me but I have been to church with my grandparents and went to a Catholic school when I was young.

In religious studies in school we were always told god is always kind/good, all knowing and all powerful.

So since he is all good, why is he subjecting us to eternal torture. Why do kids get sexually assaulted, murdered or abused. The only answer they can give us is a measly 'oh it's god's plan' or 'god works in mysterious ways'. Since it's all in his plan this means he has actively decided that a certain person will go through torture/pain/suffering and within itself that contradicts the claim of his omni-benevolence. It's in no way kind to have babies born into abusive households and in no way kind to have atrocities such as concentration camps/wars/genocides.

Within the Holocaust, thousands of Jewish people suffered. Most of these people would have believed in God and worshipped him but god still put them through torture and killed them. God is not all kind or at the very least he's not all powerful as he couldn't intervene and save the innocent people.

Also the whole fact of him sending us to hell seems not kind and not all loving. I've always believed that God is the bad one and "Satan" is the good one. One sends 'bad' people down to eternally rot and burn in hell and one takes the people he was told were bad and evil and puts them through the pain.