Who are you to presume to question such things? Does admitting that God has that power, doesn't that make you fear the consequences of challenging God?

Having personal doubts is understandable. Saying them in such a way as to influence others is very very dangerous. Such persuasion is analogous to teaching.

Not many of you should become teachers, my brothers, for you know that we who teach will be judged with greater strictness. For we all stumble in many ways. And if anyone does not stumble in what he says, he is a perfect man, able also to bridle his whole body. James 3:1-2
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There are few things that I fear. Torture is one, for all fear that those some boast otherwise. To see my children suffer is another, particularly if I am the cause of such suffering.

I don't fear death anymore, for I know where I am going in the next life beyond this one.

What I fear most is Blasphemy against the Holy Spirit. That is the unforgivable sin, the one that Jesus warned about.

All of us need forgiveness from others, and yet sometimes they cannot forgive us. The Psalmist however says that:
as far as the east is from the west, so far has He removed our transgressions from us. Psalm 103:12

...except for Blasphemy of the Holy Spirit:
32 Anyone who speaks a word against the Son of Man will be forgiven, but anyone who speaks against the Holy Spirit will not be forgiven, either in this age or in the age to come. Matthew 12:32

What you have repeated said AC, you damn yourself at enormous peril.

Death is brief suffering. Eternal damnation in Hellfire is pure horror.