The first man, Adam, was created directly by God. Genesis 2 records the specifics of the creation of the first male human being.
Genesis 1 and 2 give us the divine record of the creation of man. We were created specially and specifically in the image and likeness of God.
As bad as demonic activity is now, worse is to come! Revelation 9 is just one vignette of troubles to come from demons.
Self-appointed apostles and prophets didn’t arise in the last few decades. They were here 2000 years ago, as 2 Corinthians 4 and 11 make clear.
False doctrine has a demonic origin. 1 Timothy 4 and 2 Corinthians 10 confirm this
Acts 19 illustrates two ways in which demons can be active today. One is physical attack through the demon possessed. Another is magic and witchcraft.
Soothsayers, palm readers and others can be mere charlatans. But they can be persons who are demon possessed, as in Acts 16.
While demons cannot possess (indwell) the saved, they can oppress (from outside) those who belong to Christ. The experience of the apostle in 2 Corinthians 12 makes this clear.
Mark 9 reveals the story of a demon-possessed child. The Lord can deliver even those who seem hopeless!
Mark 5 gives a definitive example of demon possession of the unsaved. Even animals may be demon-possessed!