...I think it's a shame because it caused you and many others like you to leave Christianity entirely instead of just rejecting the false premise of eternal torment...
My position in Christianity is called "Conditional Immortality". Our immortality is conditional, based on belief in Jesus Christ. This position is also sometimes called "Annihilationism", but that's a term given to us by the opposition. They believe humans are inherently immortal. I do not.
I wouldn't say hell is the sole reason I have not returned to Christianity. It's more like the catalyst that got me started along the path of thinking, "Well if that's not true, then I wonder what else is false?" For example, the story of Jesus Christ doesn't make sense to me either, and is way too suspiciously similar to other savior stories like those of Krishna, Attis of Phrygia, Mithra, Horus, and many many others... virgin birth, December 25th, crucifixion... many of these other stories have the exact same material, which leads me to wonder why of all these savior figures I should choose Christ. Christ only became a powerful symbol after the Emperor Constantine made it the official religion of Rome, causing it to subsequently spread like wildfire (no negative connotation intended). I do respect Jesus as a symbol of altruism and universal love, but I hesitate to consider it absolute fact.
The main problem I see with the story of Christ (you've probably heard this before) is the question of why Christ was at all necessary in the first place. I'm obviously not God and can't speak for him if he exists (which I make no claim of knowing one way or the other). But, I still have to wonder... if you're an omnipotent being that gets to tailor the very fabric of space-time and write the rules of the Universe, surely you could find a way to forgive humanity of its faults (that he, by the way, designed us with in his infinite foreknowledge that this would eventually be necessary, which raises other problems). A way that need not involve the nailing of an innocent man who is basically Himself to a cross in what must be one of the most horrifying ways to die imaginable.
There are other things that prevent me from following Yahweh in particular too, mostly some of the rather horrifying things he does in the Old Testament. I'll spare you talking about some of the worse ones, but one of the ones that really bugs me is how God decides to handle the Midianites. Now, let's look at what it means to be God again. If you're God, you can simply appear to the Midianites and be like, "Hey guys, you kinda had it wrong, I'm the real God, but it's cool cause I love you. Just don't screw up again." That's what an omnibenevolent God would do. But he doesn't do that, now does he? Instead, he has the Israelites, imperfect beings, carry out the "good work" of an infinitely "perfect" being by slaying all the Midianites brutally. Now what kind of God is that? Why should I follow a cosmic bully who would do such an evil thing when he could simply appear to the Midianites themselves and allow them to become united with the Israelites in love and servitude to God? The real kicker here is that if God is omniscient, He designed the Universe the way he did knowing beforehand that he was going to have to slay millions of people and send them to an eternal torture chamber... that alone disqualifies Him from worship in my view.
What I'm getting at here is... why all the seemingly unnecessary death and destruction, concluded with eternal torment?
To address your other point about Annihilationism and Conditional Immortality: Even if there is such a thing as heaven, I would think everyone would reach a point somewhere in eternity where they would get bored even of heaven... no challenges, no human drives, no purpose to your existence other than to praise God... I feel like even being in the presence of God would lose its edge after a few trillion years. Humans by their nature need challenges and goals. When you're in the traditional version of heaven, those don't exist anymore. Heaven would make a nice respite, and I think I could even enjoy myself there for a few thousand years. But as you creep closer to infinity, I feel everything would have a certain sameness to it in a place with no goals or challenges... I would want to stop being eventually. I feel like everyone has a breaking point at which even heaven would start to become more and more like hell. Think about it... you spend a trillion years in heaven... you haven't even started eternity. And all you're apparently going to be doing in that entire time is singing God's praises. You're going to tire of it eventually... then it will slowly drive your immortal soul insane, I would think. This problem could probably be solved if God assigned passed on human souls a purpose as angels or guardian spirits or something like that. But without purpose, drive, and challenge, a human mind/soul/call it what you will... will eventually go mad.
If there's an afterlife, I really do hope it's quite literally "the next great adventure". An afterlife where I do nothing but praise God doesn't really sound all that appealing to me... which is probably why early Christian clergy had to invent the dichotomy of heaven and hell in the first place. Heaven sounds more appealing when hell is the only alternative.