Jesus was a man -- 100%.
He was also and at the same time 100% God.
If you disbelieve either statement, then you are not a Christian.
I'm not trying to insult you, nor even criticize you. It's simply a fact: to be a Christian, one MUST believe that Jesus Christ the man was also the Eternal Word, Second Person of the Godhead.
Mary is the mother of Jesus. Jesus is God. Therefore, Mary is the Mother of God. To believe otherwise is to deny Jesus' humanity or His divinity.
I believe in the divine appointment of Mary, but to believe that God has a mother is to believe that there is a God and Goddess before our God... It isn't the case, and that is blasphemy. "Thou shall not have any gods (or goddesses) before me..." EXODUS 20.
I know your argument, I once had the same view as you until the Holy Spirit revealed the truth. Until the Holy Spirit reveals it to you...shalom.
This is the end of this discussion.