Again, to me, Satan is like the big bad wolf in the story of the three pigs if that story was written for children 10,000 years ago in Judea. Then what happened, 10,000 years later, superstitious European pagans discovered this and another story about a big bad wolf hidden in a tomb. When they read the stories they were astonished and "believed" it was a historical document about a magical time in the distant past where pigs could talk and build houses. So they created a strange religion with a priestly class, built temples and statues dedicated to honor the wise pig, and bizarre rituals designed to express hatred for the big bad wolf, and set out to persecute anyone who wouldn't worship the wise pig and was judged by a panel of supreme religious experts to be wolflike
That being said Satan is a metaphor for a human being just like the three pigs and the big bad wolf are. Simple
What I find hysterical is that some people actually refuse to believe in any God that would allow Satan to exist which, to me, amounts to being angry at God because the big bad wolf ate grandma in the other historical document found in the same tomb. It would be as ridiculous as hating God because people like Trump exist.
Even though its up to the people themselves to apply their will to cast out demons, whatever costume they wear.
Today a person could write a story where the big bad wolf is huffing and puffing and trying to blow the White House down. The day is coming, indeed it is already here, when all will see how wise the pig who built it was.