At what point does it stop being a punishment and just all you've ever experienced?
Like how would they make it so you don't get use to it? Erase your memory every 10 minutes? Sounds like the end of those 10 minutes is relief. So all you've ever experienced is 10 minutes of pain than relief. Doesn't sound so bad. Even if all you ever remembered was the memories of your past life and then 10 mins of pain at least you would have those good memories to reflect on before you would have relief again.
You're trying to corporealize a concept that is fundamentally non-corporeal. An omnipotent being could make eternal suffering mean suffering eternally simply by virtue of being all-powerful. The means by which this is done is (would be) completely beyond our understanding or even able to be conceived by our current understanding of the world.
Which is exactly why it it's so obvious that it was created by the minds of men. It doesn't make sense to our understanding of the world/physics and the only argument anyone has comes down to "well if this all powerful God I can't prove did exist he'd be able to do all of this in a way we can't understand!"
Sure, but anyone can theorize an all powerful omnipotent being and then make up whatever rules about them damning/saving you and the necessary conjecture about them being so beyond us that we can't understand it.
To me that's just a shield against criticism, a red flag that the person making the argument is attempting to bring it into the realm of unfalsifiability. A very human tendency for a very human idea of god.