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.
This is the line that I object to. Mary was the means by which God was made incarnate. But Mary had absolutely nothing to do with our redemption beyond that. To say otherwise is to take away from what God alone accomplished. Quote to me any Scripture that says otherwise.