Satan is a creature, a creation.

Perhaps one of the most powerful creatures ever made, but still merely a creature, as you and I also are. God made through Jesus everything.

“For by him were all things created, in the heavens and on the earth, things visible and things invisible, whether thrones or dominions or principalities or powers; all things have been created through him, and for him.”
Col 1:16 WEB

Satan, like us, was created good.

In fact, Scripture says,

“God saw everything that he had made, and, behold, it was very good. …”
Gen 1:31 WEB

But Satan, again just like us, corrupted his way. He was originally evidently one the living creatures who hovered over the throne of God Himself in heaven, Ezekiel 28. There the king of Tyre is used as a “type,” symbolic of Satan, and it describes him as a beautiful and powerful creature. In Isaiah chapter 14 the king of Babylon seems to be used as a “type,” symbolic, of Satan. It says he aspired to be higher than God, and was cast out of heaven. Isa 14:13-14.

Satan began the revolt, but drew others into this revolt. Rev 12:4 says that he drew one-third of the angels of heaven into his revolt, and was at last thrown down out of heaven, Rev 12:7-10. Also yes, the human race was also drawn into, seduced into, this revolt.

Satan is ALLOWED certain power and rule in this
universe, for a short while.

He is called “the god of this world,” 2Cor 4:4 WEB. He is allowed certain power to tempt and to try us, to see what we are. He is called “the accuser of our brothers,” Rev 12:10 WEB. He can offer some rewards to his servants, and with these things he attempted to seduce Jesus the Christ.

“5 The devil, leading him up on a high mountain, showed him all the kingdoms of the world in a moment of time. 6 The devil said to him, “I will give you all this authority, and their glory, for it has been delivered to me; and I give it to whomever I want. 7 If you therefore will worship before me, it will all be yours.””
Lk 4:5-7 WEB

Jesus corrects Satan when he is wrong, but does not correct this.

“the whole world lies in the power of
the evil one.” 1Jn 5:19

Indeed, we have ALL fallen under these powers.

“However at that time, not knowing God, you were in bondage to those who by nature are not gods.”
Gal 4:8 WEB

We once walked by Satan’s dictates, and sometimes still do. So we are warned to not desire the fruits of a corrupted world that is passing away, 1Jn 2:15-17.

God is willing to protect us.

“ … who will not allow you to be tempted above what you are able, …”
1Cor 10:13 WEB

The problem is how to come to our senses, and
escape the devil’s snare, 2Tim 2:26

Jesus is that answer, to redeem ourselves in His blood.

WEB is the World English Bible, a copyright free revision
of the original ASV American Standard Version 1901