You need to read the Joy of Satanas, as you have many misconceptions that are clearly coming from an abrahamic / xian background.
True Satanism has nothing to do with hating humanity, or eternal torment or suffering. It is about enlightenment. Satan and the Demons are the original Gods known to and loved by our ancient ancestors. They bring us knowledge and truth so we can advance and set our souls free from enemy lies that have held humanity back dangerously. Lies such as the nonsense about "eternal hellfire" and torment, that are designed to frighten people into compliance.
As for people who are inherently evil and do terrible and sick things, they will be punished and have no place in a true Satanic world. But this has nothing to do with "hellfire" mentioned in abrahamic programs. Sick and depraved behaviour in the world today all has the same source - jewish abrahamic programs like xianity, islam, communism and related. These will be wiped out.
https://joyofsatan.org/
Meditating to "hellish ambiance tracks with people screaming" is going to do nothing other than attarct negative energy to yourself, and keep you in an endless loop of poor life experiences.
Most of us who are here, are here because we were drawn to Satan from previous lifetimes of walking this path.
I suggest you study and learn the truth, so you can begin a real journey towards Satanism.
Hail Satan!!