I agree that many theologies out there characterize God as a monster.
(WE DO NOT BELIEVE THE FOLLOWING)
God created you for the sole purpose of tormenting you forever.
God didn't choose some to be elect so there is no possibility of them ever being saved.
God's supposed election is purely arbitrary, not based on anything the person does, thinks, or is - just God's whim.
God torments people forever just to prove He can.
(WE DO NOT BELIEVE THE ABOVE ITALICIZED STATEMENTS!)
Those kinds of theologies make God a monster. Trying to reconcile those kinds of theologies that describe such a monstrous God with "God is love" have driven folks away. Those are NOT what we teach.
God gives man the dignity of free will. If a man truly rejects God's mercy, He isn't going to force it on them. He will still love such a person. But we all have the dignity of choice. Our choices affect who we become.
If our beliefs, actions, heart, etc. incline us toward God, and we become very much like Christ - transformed, in this life, as we are supposed to do according to the Gospel, with the help of the grace of God, then we have every reason to hope in Christ, to love His appearing, and in that case we will enjoy His Presence forever.
If our beliefs, actions, hearts, etc. incline us away from God, make us more selfish and destroy love in us, make us into creatures very unlike Christ ... then we have every reason to fear His appearing, to fear standing before Him, we may hate and reject the love of God. Still, He will be there, and we will no longer be shielded from His presence as Moses was when he asked to see God. If there is nothing like Christ in us, that very Presence and His love will torment us, we will hate it, seek to escape it, but not truly be able, since where can we flee from God, such that He us not there?
This will be fiery torment. Not because God wants to torment people. Not because some cosmic law demands He do so, whether He wishes it or not. Not because He wants to show how big and powerful He is. But simply because He Is. And we are not compatible to bear His presence. It will be we ourselves, and what we have become, that judge and condemn ourselves.
That much we must affirm.
Now, is it POSSIBLE that such a scourge could prove somehow a motive for people to relent? Maybe, we don't know. Will it BE possible for them to change, repent, relent? Or will they be fixed at that point in their perversity and enmity with God? Again, we don't really know, because God has not told us. We may hope this. We may ask God for it. We may pray for God's mercy, whenever He will extend it and for whatever purpose it may serve, for any person, and group of persons, or even all persons. Then ... we leave it in God's hands. That's all we can do. That's all we know. God alone knows the final end.
But there is no reason we have to think that God will simply mercifully destroy. So our hope is that many, most, or even all might be saved. But we have no assurance, no knowledge. Only God knows beyond this.