A few centuries would be nothing compared to endless torments. There is an infinite difference between a God Who inflicts endless torments (or annihilation) & a God Who does not.
Punishment of the loving Omnipotent God is corrective. It's not the endless, sadistic, pointless, hopeless, useless, insane, tortures of a madman...or an endless Hitler-like gas chamber as in the endless annihilation theory.
Hitler killed people by gassing them to death. He couldn't keep them dead. OTOH in the endless annihilation theory "God" annihilates those he doesn't like and keeps them annihilated for all eternity. So it's just like an endless Hitler-like gas chamber. Only infinitely worse than what Hitler could achieve.
You are here to propagate the endless Hitler ("total eradicator") God you believe in. You slander the One True God, Love Omnipotent, making Him into an eternal Hitler who not only gasses to death those He doesn't love, but makes sure the Hitler-like gas effect lasts for eternity. Thus your "God", unlike the True God of the Sacred Scriptures, is a Hitler for eternity. The eternal Hitler "God".
It seems absurd that Love Omnipotent the Good, who doeth Good, is Merciful, & a Savior, even the Savior of all mankind, creation & the cosmos, for Whom nothing is impossible, Who created a universe that spans a distance of billions of light years, is a sadist plus being an eternal Hitler-like gas chamber guy to all beings who haven't met His expiry date, & has an extremely soon coming expiry date on His love (not much longer than the expiry date on a carton of milk), & is impotent to save, or just too stupid in how He created those beings who are created to succeed in His will that all of them be saved.
“How ironic that those who believe God will not violate the ‘free ’will of man have no problem believing He will violate His own free will—that all men should be saved!” - David Nuckols
“He does not save men by arbitrary force. He saves by their wills, through moral influence. God has resources in his universe, the all conquering agencies of love, to make the unwilling soul willing! He has light enough to make the blind see, and love enough to melt the hardened heart.” -Quillen Hamilton Shinn
"It's tempting for me to believe that God is the grand master playing chess and we are the 5 year old rookie. Theoretically we are "free" to win the chess game, it is possible. No not really in the libertarian sense - it is unlikely to the point of virtual zero. in other words, God will always get His way, despite our best efforts not to be saved."
According to the Bible mercy will triumph over judgement.
Love will conquer all.
As someone said:
"annihilating someone DOES NOT RESPECT THEIR FREE WILL!"
That statement is nothing but assumption, human opinion based on nothing, no facts, nada. Are you God that you would know? Would God accept anything less than true repentance from the heart?
Why would i be gnashing? I believe in Christ.
How could i send others to "hell"? Don't they have free will?
Irrelevant. No Christian is headed to "hell" as long as they continue in the faith. OTOH, if they are living in sin or not sure of their salvation, then they may have a lot to worry about.
https://www.tentmaker.org/books/hope_beyond_hell.pdf