Hell is not actually mentioned in the Bible. Just about everything Christians 'know' about Hell or The Devil comes from the folklore of Late Antiquity and the Medieval times.
In the OT, when people die they go to Sheol. Sheol is where EVERYONE goes. It's not a punishment. It's sort of a 'shadowland'. Jews never claimed to know much about it.
In the New Testament they mention Gehenna. Gehenna was a valley south of Jerusalem that was used as a trash dump. Fires were kept going there constantly to burn the carcasses of dead animals and of executed criminals. It was where you went if you were a criminal. When Jesus speaks of 'the lake of fire', that's what he's talking about. Today Gehenna is pretty and green and there are picnic tables there. So if you're ever in that neck of the woods, you can have a picnic in Gehenna!
There's a theory that Christianity 'elevated' the Devil to be nearly God's equal. This is called a 'manichaean view'. Manichaeism was a religion that had two gods, one good and one evil, and they saw the earth as a battleground between them. There have been a lot of religions like that, so perhaps it is something attractive for people to believe. Christians 'modified' Christianity to be a battle between good and evil on a universal level, a war between God and Satan. Hell comes from that view, but it is not a Christian concept endorsed by Jesus or the authors of the New Testament.