Did Satan create religions?

Mostly not.  He generally twists existing religions and churches.

Some of them, but not any of the major ones.

When the Babylonians started to build a pagan religious tower, Jehovah confused their language and scattered them to the ends of the earth. They took their religion with them, and that is how a world empire of Babylonish religion got started. Truly, it is Babylon THE GREAT. (Genesis 10:8-10; 11:1-9) Down to our time, the mysteries of ancient Babylon are reflected in the beliefs and practices of the world’s religions. (Revelation 17:7) The Hebrew name for the city, Babel, means “Confusion,” a fitting label for today’s hodgepodge of false religion!

Just as many people on earth have acted badly by disobeying God, so also in heaven many angels have rebelled against God. (2 Peter 2:4) Disobedient angels are called demons. Foremost among them is Satan, the Devil. Satan and his demons are misleading mankind.​—Read Revelation 12:9.

Satan has used corrupt businesses, human governments, and false religions to influence people and to turn them away from God. Thus, Satan is responsible for the injustice, violence, and suffering that afflict mankind.​—Read 1 John 5:19.

 How do demons mislead people?

Satan has deceived many people by teaching that the dead become spirits that can communicate with them. The Bible, however, says that the dead can do nothing at all. (Ecclesiastes 9:5) But demons often deceive people by imitating the voice of dead loved ones. (Isaiah 8:19) Demons mislead others through spirit mediums, fortune-tellers, and practicers of divination and astrology. God’s Word warns us to avoid all such practices. So we should discard anything in our possession that is related to the demons and the occult.​—Read Deuteronomy 18:10, 11; Acts 19:19.

If we love Jehovah, we do not need to live in fear of the demons. When we study God’s Word and do as it says, we oppose the Devil and draw close to God. Jehovah is more powerful than the demons. His faithful angels can strengthen us in time of need.​—Read Psalm 34:7; James 4:7, 8.

Yes, satan create false religions to deviate mankind to hell with him, in  aiming  to battling with the only real religion of GOD, send down for all mankind from the beginning till the end of time.

Since Satan is mythical, no.  Humans created religions and dreamed up mythical gods.

He created all false religions using his influence on mankind.

He did this to hurt God and us.

He wants to be worshipped too.

This culminates soon , when he is kicked out of heaven.

The son of perdition is one of his many titles.

Rev 12 is future as well as the past.

The first 5-6 verses alone are the past.

The rest are prophecy...

No, it was his brother in law Stan.

Only the Catholic Church has the fullness of truth.  The Catholic Church is the original Christian Church and the only Church established personally by Jesus.

No, Satan doesn't exist.

No. Religions created Satan.