The problem with your silly idea is that your god does not judge after a moral standard any sane person would consider fair. and to that you allways answer with a variation of this:
"but GOD is GOOD by DEFINITION. you cant judge GOD without BEING GOD"
which is a false dilemma ... well actually its not even a false dilemma since you are just willing to consider one option.
Sane you say? Like the judgement another poster here just made indicating that fatal force isn't justified when a police officer is shot? The definition of God is fixed by the hundreds of millions of people who have known his goodness. You do not know God's goodness so you try desperately to use another definition.
Moral standard you talk about - all relative nonsense without an All-Good creator.
Hell is unlikely or immoral? Just the opposite. It just is. Good is unlikely without God. Which is the default? Taken a look around the universe lately?
This an actual picture of the surface of Venus: About 900 degrees F , 464 C.
Compare to:
The bible says that ALL good gifts come from above. Cool water, luscious fruit, good friends, family, art, love .... all gifts of God whether you are a believer or not, whether you recognise it or not. When people want separation from God, and he finally gives them what they want, they experience an absence of all of these things.... not because the default condition of the universe is good, but because the absence of God is the elimination of all that can possibly be good.
It can be no other way. Since God consumes sin by his nature, the unredeemed must be somehow apart from him, and hence experience all that can possibly be lacking from that which is good... for eternity.