> How is it appropriate to be tortured forever even though I've committed no crimes?
Who said anything about crime? What you're guilty of is refusing to acknowledge the truth and therefore not living according to the truth you deny and refuse to acknowledge.
Suppose you claim that COVID is made-up, that it's not real, it's just somebody's fairytale to control people (and we both know that some people are actually saying this). And so because of that belief you are not careful, you expose yourself to the virus and die (as did the Cameroon pastor, among others). You pay the penalty for refusing to acknowledge the truth and therefore not living according to the truth you deny. And you suffer the consequences of that.
> Why are god's opinions factual?
Since God is defined as a non-embodied personal spirit who exists as omnipresent, omnipotent, and omniscient, and necessarily so, then God doesn't have opinions. He is truth.
> But hell never ends
You should know that not every Christian subscribes to this belief. There are theories about reconcilationism, semi-restorationism, modified eternalism, and annihilationism, all with some kind of scriptural backing. In other words, hell isn't necessarily eternal for all who enter it. It may only be eternal for those who refuse to be reconciled.
- Matthew 11.22-24 & Luke 10.12: Jesus says it will be “more tolerable” for the people of Sodom and Gomorrah than for the people of Capernaum. That would indicate to me a more harsh punishment and a less harsh punishment.
- Matthew 23.14: Jesus tells the Pharisees they will be punished more severely for the way they are deceiving the people and living as hypocrites.
- Revelation 20.13: Each is going to be judged according to what he has done. Since that is the case, then the punishments and rewards can’t be the same for everybody.
- and finally, Luke 12.47-48 (workers are punished with more or fewer blows). There are degrees of punishment, and even sins of ignorance are treated differently than sins of intention.
Why I bother to point this out is because often those who consider hell to be unfair are picturing the same punishment for all, which is most likely not the case, and infinite punishment for finite crimes, which may also not be the case. People will be punished according to the works they have done (2 Corinthians 5.10).
Don't get hung up on your concept of God's unfairness. One thing the Bible is perfectly clear about: God will be fair. Everyone will get what is exactly is appropriate.
If you're concerned about never escaping, then take the necessary steps to have a relationship with God so that hell is not in your future. Come to God. He invites you to Himself, to a love relationship of belonging and forgiveness. The choice is yours; free will is not only existent but also operative. So choose to come to God.
> What's the use in a punishment if the person being punished will never get better?
Certainly you're aware that we send certain criminals to jail for life. The point is not rehabilitation, but justice. It's not sadism, it's justice. Justice is about morality, harmony, and balance, not sadism.