Mary in scripture and the Gospel of John. She is the new ark, which was revered in times past. The ark foreshadowed Mary which was to hold the Holy Word of God.
11 minutes of proof if you can handle it. This video settled the Mary debate for me.
It’s not dogma and does not have to be believed. The RCC is a guideline, not an official rule book. Many things are contested in the RCC.
As for the Co-Redemptorix being a satanic package… that is laughable. If you knew your scripture you would know Gabriel asked our Lady if she would become Mother of God. She said yes and it is this that makes her the co-redemptrix. No one ever said she had the power in and of herself to save souls. That is a straw man on your part.