The heretical group that worshipped Mary were called
Collyridians, from the word relating to the small rolls or cakes they offered her as sacrifices.
You may hear some Catholics referring to “worship” of Mary or the saints, but that’s a very archaic way of describing it. Normally we’re said to “honor” or “venerate” her, due to her intimate connection with Christ.
To get technical, in Greek, “latria” is the form of worship reserved for God alone- you can see the word in idolatry, for example. Idol - latry. We honor or venerate the saints, and the word used there is “doulia”, which refers to servitude. We give to Mary, as foremost of the saints, “hyperdulia”.
Some confusion also comes from Catholics referring to Mary as “mother of God”. This doesn’t mean we believe that she created God or is the source of His divinity, but rather, as with all things with Mary, points toward Christ. Mary is the mother of Christ (a person, not merely a nature), Christ is God, therefore Mary is the mother of God. It’s a denial of Nestorianism and a focus on Christ’s full divinity.
As a protestant, I used to see art depicting a mother goddess and child compared to Mary with Jesus. Isis with Horus was a favorite. However, there’s nothing pagan about a mother holding her child, and there’s only so many ways to depict it! There’s really nothing to this, either.
This is the official Catholic teaching on Mary, from the Catechism of the Catholic Church. It’s only a few paragraphs- you’ll find no mention of her as a goddess.