The world was a hostile place before God placed Adam & Eve in the Garden of Eden. When God kicked them out of the Garden, He sent them into a hostile world. The Garden was a Sanctuary from the hostility that existed because the Devil had already been cast out of Heaven and was wandering to and fro on the face of the Earth seeking whom he could devour.
The Devil existed before Adam & Eve.
He's a private citizen now, he can do what the fuck he wants.
That must tear them up. They lost their punching bag.
God created angels before He created people.
Satan is a fallen angel.
God allowed Satan access to humanity on Earth.
Though not mentioned in Genesis, God elsewhere explains that angels were present at the creation of the earth. We find this detail recorded in the book of Job, where God asks Job: "Where were you when I laid the foundations of the earth? . . . Who laid its cornerstone, when the morning stars sang together, and all the sons of God shouted with joy?" (Job 38:4, 6-7). The "morning stars" and "sons of God"—the angels—exulted as they saw the earth miraculously come into being.
https://www.ucg.org/bible-study-tools/booklets/creation-or-evolution-does-it-really-matter-what-you-believe/the-world-before-man-the-biblical-explanation