Yes, this is Church doctrine, and is a statement about who Jesus Christ is, not who Mary is.
the co-redemptrix
Not Church doctrine
the intercessor
Yes, all of the saints, including the Blessed Virgin Mary, are intercessors.
the woman of Revelation who will save the world
Certainly, she is the woman mentioned in the Book of Revelation, but I don't know where the part about her "saving the world" comes in.
and the one who crushes the serpent’s head.
Yes, ipsa conteret caput tuum("she shall crush your head," Genesis 3:15, Vulgate, God to the serpent)
I grew up worshipping Mary.
If you were giving honor to Mary that is only due to God, then you weren't following the Catholic Church.
We could not know Jesus Christ without going through Mary to put in a good word for us. I still know many people who believe these things, including family members.
The Catholic Church doesn't teach that. If you paid attention during your Catholic upbringing, you would find plenty of devotions directly solely to Jesus, such as the Sacred Heart, the Holy Name, and most importantly, the Blessed Sacrament.
Thanks for your effort to reply, but I don’t really care anymore. Terrible things happened to me and other children in our area because of our church leadership and I was eventually booted from the church. Even though years later I was asked to come back, after the truth came out, there’s no way I’d ever go back to worshipping Saints.
But there’s a good ending, I was born again.