The answer is rather simple if you will just spend some time in the Bible. Let's start with why was Hell created in the first place? Answer : it was created as a place of punishment for Satan and his angels. Matthew 25:41 " Then the king will say to those on his left, "Get away from me! You are under God's curse. Go into the everlasting fire prepared for the devil and his angels!" Hell is not the place where Satan rules his kingdom from, but is the final place of punishment for him and all who follow him. The idea of Satan ruling Hell comes from writings like Milton's poem Paradise Lost where the quote " better to reign in Hell than serve in Heaven" is found. Just like the description of Satan with red skin and horns come from the Middle Ages, much about him is folklore and legend not true fact. In fact the Bible tells us in Ezekiel 28:12 Son of man, take up a lamentation over the king of Tyre, and say unto him, Thus saith the Lord Jehovah: Thou sealest up the sum, full of wisdom, and perfect in beauty. He was and is a very beautiful archangel, so powerful even Michael the archangel would not argue with him "Jude 1:9 But Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing judgment, but said, The Lord rebuke thee."
I am convinced through my study of the Bible that God does not send anyone to hell, they choose to go there by their own free will! God gives us a choice to choose to follow Him or Satan, if we choose to follow Satan, how can we expect to escape the punishment set for Satan and his angels?! I am constantly amazed at how stubborn some people are when God makes Himself so clear to them and they still refuse to repent. No greater example of this than in Revelation Chapter 16:9,11&21 people are experiencing the worst of the Great Tribulation and know full well it is from God, yet still blaspheme God.Why? Because of the inherent sin nature of man.
One of the biggest objections people have of Reformed theology is the view of limited atonement. In other words not all who are called will respond in faith. The verses in Revelation 16 seem to make this crystal clear, no matter what happens some will follow Satan into Hell regardless of what happens. According to Revelation 12:7 Satan, in his rebellion in Heaven, was able to draw away 1/3 of the stars of Heaven i.e. Angels. It should not surprise us if mere mortal men follow him too.