And who created Satan? God!
Who created choices? God!
So God creates something and decides mankind can live for 70 years and into punishment for eternity while Satan gets a free pass to live for thousands of years with the opportunity to corrupt a gazillion more victims.
Sounds logical to me.
God didn't create Satan as an evil being. He created him righteous.
Satan's beginnings in evil are described as happening when he decided "I will make myself like the Most High." Isaiah 14:13
God created angels and humans with the ability to make choices. We are not robots. God was not evil in creating good creatures. The creatures corrupted themselves by their own free choices.
The fact that God lets people choose to continue in sin/rebellion does not make God guilty of our sin or rebellion. The Bible actually says the opposite, that it grieves God as well as makes Him angry. Although you try to put the blame for Satan and people onto God, God is the judge and He has declared that we are the guilty ones. There is no valid arguing with God.
Satan will end up in hell. The Bible says hell was originally created for Satan and the angels.
I know of at least one reason for allowing people and Satan to continue in rebellion to God: God is letting them have their way and in doing so is letting evil play out to be seen for the evil that it is, as well as His judgment, when it comes, for being right in judging all evil. There is no evil act or thought that will not go unpunished.
The human mind can't really accept the eternal consequences of hell as a punishment or how guilty we actually appear to God because of His perfect righteousness. People reject this because they know they have done evil and can't, of themselves, be righteous. The only hope is found when one sees not only that they are guilty before God but that He Himself suffered tremendously just so that He wouldn't have to punish us--His only requirement is that we deal with our rebellion against Him by acknowledging it and by embracing for ourselves in a personal way, what Jesus did at the cross. He took upon Himself the wrath of God that we deserve.
Part of turning from our rebellion against God to God is to actively receive the truths in God's word about Jesus: that He is God who became flesh and dwelt among us, that He died for our sins and that He was raised alive the third day. Basically, pray to God about it. Acknowledge to Him that we've sinned against Him and that we want Jesus to be our God and to save us from our sin. It is that turning to God, through talking to Him about it, and expressing to Him that we embrace what Jesus did on our behalf, that God does the work to make us born again into His kingdom. It's described like this in Ephesians 1:13:
And you also were included in Christ when you heard the message of truth, the gospel of your salvation. When you believed, you were marked in him with a seal, the promised Holy Spirit
When in church today I worshiped God for His mercy toward me. It's not until we see that we really haven't deserved God's salvation or His kindness given to us through Christ that we can actually appreciate the beauty of the forgiveness of sins that belongs to the one who has trusted in Christ. Being a Christian is all about God being merciful, showing everlasting kindness, love and commitment to one who was once His enemy but now He has made into His friend.
Greater love has no one than this: to lay down one’s life for one’s friends.
John 15:14, 15
