Mother of God implies existence before God. That is simply not true, nor is it biblical. Mary is the “Mother of Christ” and Christ is the Son of God. There’s a significant difference there. Mainly, the difference is one of idolatry. Please quit idolizing Mary, it’s not biblical.
“Mother of God implies existence before God.”
No, it doesn’t. It only implies Jesus is God. It can’t imply pre-existence before God because May is only a creature, and not the Creator. The Creator, however, chose to be born as a man (a man who was also God) and to be carried into the world by a woman. Women give birth to persons, not natures. Jesus was a Divine Person. Mary could only be the mother of God for that is what Jesus is.