I reject the Mother of God line. Elevation of Mary to an exalted status, sharing in any way in our redemption, serving in any way in our access to the Son is bordering on idolatry. It is not Scriptural; it is not acceptable.
The Scriptures say "The mother of my Lord" Lk:1:43
It would seem then, that your beef is with God, for it was His actions which elevated her. It was God's choice that Mary should share in the redemptive nature of Jesus' life. Had He so wanted, Jesus could have dropped out of the sky, fully grown. Ah, but that was not as God willed. Instead, He willed that Jesus would be born of a woman. There is nothing in Catholic Marian doctrine that is unScriptural. It is only those outside of the Catholic Church who say so. And, I reject your beliefs as being unScriptural.