Parable of the Rich Man and Lazarus shows that those in Hell are not tortured or treated in any negative manner other than not getting amenities as they would if they were in Paradise [Heaven].  Abraham and Lazarus kindly explained to the Rich Man why he had to exist as he did while they were in Paradise [at the time near Hell but with an impassible gulf between].

The fact that it was allowed was a kindness to the Rich Man in Hell.  He was treated respectfully as well – both by Angels who set it all up, God who allowed it, and Abraham/Lazarus who met with him [so to speak].

The Rich Man basically tormented himself by wanting the amenities of Paradise and to be there instead of Hell.  He most likely remembered being rich with all the amenities of being such and missed them all.  He also, most likely tormented himself with the knowledge that it would not change and he was headed to Judgement Day, stripes, and the Lake of Fire with no reprieve.  He was tormented by not being in Paradise where he wanted to be instead of where he was and he could not do anything about it ever.

So…….. even though a sinner is in Hell, he is not tortured.  He is there with his own feelings on the situation and his memories and regrets.  He is in Hell not Paradise where he wants to be.  He has the knowledge “It is TOO LATE.”

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Hell is not going to be pleasant, but no one is tortured.  Those there may torture themselves with their own desires, memories, and lack of amenities.  Those who want drugs, to kill others, rape others, and other horrid acts will not be able to do such and may find that they cannot do what they want to do to be a torment.  Such torment is of their own making. [Hell has an absence of good, community, friendships, and camaraderie.  A sinner is there in solitary confinement. There are no amenities. Those in Hell know that non-sinners are in Paradise with amenities and happy.]