I think the question has already been answered by now in a way or another but I’d like to add the general view of the Eastern Fathers on hell that is quite fit to solve the problem.
In summary, the Eastern Fathers think we’ll all be in God’s presence once and God’s eternal light will flow around us – the river of fire. Those who love God will enjoy it, those who have rejected him will suffer. But it’s exactly the same light that penetrates one so God cannot be accused of torturing anybody. I think it’s important to make this clear because what the original poster actually doubts about is this: if God, by his omniscience, knew that this or that person would spiritually wreck and go to a place of Hell to receive everlasting and unnamed torments, why wasn’t he that merciful as to not create him at all?
Well, I think we should beware of questions concerning God’s omniscience. It’s like entering a spiral that ever draws you further down into the bottomless depths of thought, one question following the other, no sure ground ever in sight. But this one question can be resolved. By the conception of the Eastern Fathers and the river of fire.
Take a look at:
philthompson.net/pages/library/rivernotes.html