Nonsense. It’s clear Satan has power, but nothing on the order of God, Christ, Holy Spirit. Lucifer is no god, but his demons refer to all of their - thing - as The Kingdom.
Have you read Job? All the way through? This isn’t an allegory, it’s an actual guy being subjected to the power of Satan.
It’s pretty plain that Christ has more power than Satan. He’s in Heaven now, and He still works in our lives. Satan works against God by hurting us, and he seems to live here.
I don’t get it, but I can live with that. What’s so ludicrous about it?
Well it's unbelief, pure and simple
Oh he lives here all right, in his possessions, but if you are Christ's, then you are not a possession of Satan's any longer.
Did Job think that God was testing him; strengthening him by his many trials?
Yes, he did. But apparently you don't believe Job.