The Condemned in Hell, fresco by Luca Signorelli, 1500–02; in the Chapel of San Brizio in the cathedral at Orvieto, Italy.
All religions have good teachings and wicked teachings, sublime teachings and nonsensical ones. You'd be hard pressed to find a reasonably objective contemporary scholar of religions who would deny this. But one of the unequivocally nonsensical and wicked teachings propounded by some religions - particularly predominant instantiations of Islam and Christianity - is the idea of eternal punishment. The idea is absolutely repugnant to the intellect and makes nonsense out of the idea that God is merciful or all-loving.
The simple fact of the matter is that there is no eternal hell and there's no Satan who will abide in hell forever. This absurd idea arises from the tribalistic vindictiveness of minds overcome by a deep religious stupor. So strong is this religious stupor that even a luminary mind like Thomas Aquinas debased himself and gleefully taught that the righteous in heaven would take pleasure at the eternal punishment of the dammed.
Don't be like Aquinas in this regards. Wake up. Arise from your dogmatic slumber. There are more things in heaven and Earth than are dreamt of in your narrow religious philosophy.