“God is a just judge, punishing and torturing forever is not just...”
He is just because He is perfectly holy, righteous, and wise. He makes no errors, he renders no unjust judgments.
He is clear that the punishment is eternal. I take no delight in that, as a redeemed sinner, nor should any who grasp (albeit imperfectly) His holiness and our sin. We are not in the position to dictate what is just.
Death is eternal. Only God can give life.
“He is clear that the punishment is eternal.”
“16 “For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life.”
Perish - “to become destroyed or ruined : cease to exist”