Yes God created Satan. But Satan chose to rebel and fell. I know of no provision for Satan’s salvation and, in fact, the Bible says that Hell was created for Satan and his angels.
But here is a distinction b/n Mormon and orthodox Christian doctrine. God did not create Jesus. They are one and the same. They and they alone eternally pre-exist.
We disagree about that. If you believe God the Father created all, then you believe He created the spirits of both Jesus Christ the Savior and Satan. If you do not believe that, then you have some alternate belief.
If, as it says quite often in the Holy Bible, that Jesus Christ is the Son of God, as I do, then why do you have your bowels in an uproar?