Why does the devil tempt us to do bad?

think of the story of Job
In this case imagine Satan as the older brother. He is mad the we, the smaller brother get attention even though we are, on the cosmic scale, just sucking our thumb and drool a lot. So Satan throws a fit to get our fathers attention, and a 3rd of the angels agreed.
Satan claimed we dont deserve the attention, we only follow him and praise him because we have all these good things. So Satan too has to learn about him being wrong. He is permitted to throw his fit, tolerated. He takes Jobs livestock, wealth, health, family and everything but his life. He will then see that he still praises God in the end, that the praise and worship is genuine love, that he was wrong about us Humans being such low creatures and that here too, God was right again.
This is playing out in front of us all right now globally.

Some Latinas age really bad. She'll look like Jeb's wife in a couple of years.