'Satan' is only mentioned about 19 times in the Old Testament and only once in the New Testament. No where in those bibles is he referred to as the ruler of a place called hell or that he was once an angel but was cast out of heaven by God. The word Satan is used more as a description of evil than an actual evil deity ruling over a place called hell. I think the idea of Satan and his realm of hell is a narrative created less than a few hundred years ago to keep people in line....
Who Is Satan?
Hell was invented by The Church to make the peasants give them money.
Karl Marx held that same opinion.
...in order to charm the golden birds, out of the pockets of his dearly beloved neighbours in Christ. He puts himself at the service of the other’s most depraved fancies, plays the pimp between him and his need, excites in him morbid appetites, lies in wait for each of his weaknesses – all so that he can then demand the cash for this service of love. (Every product is a bait with which to seduce away the other’s very being, his money; every real and possible need is a weakness which will lead the fly to the glue-pot. General exploitation of communal human nature, just as every imperfection in man, is a bond with heaven –
an avenue giving the priest access to his heart; every need is an opportunity to approach one’s neighbour under the guise of the utmost amiability and to say to him: Dear friend, I give you what you need, but you know the conditio sine qua non; you know the ink in which you have to sign yourself over to me; in providing for your pleasure, I fleece you.)
Karl Marx
Economic and Philosophical Manuscripts of 1844
3rd paragraph
Human Requirements and Division of Labour, Marx, 1844