Correct, as the Catholic church teaches both in Revelation and today, we should worship God alone. The question was whether we should pray to angels, not worship angels.
Sadly, the adjectives used to describe the difference in the nature of a petition by object - dulia, hyperdulia and latria - are not demonstrated to my reading by the actual words used in many of those petitions. Indeed, I doubt that good intentions are enough in proximity:
And when Aaron saw [it], he built an altar before it; and Aaron made proclamation, and said, To morrow [is] a feast to the LORD. - Exodus 32:3-5
Mary is the all holy one: "By asking Mary to pray for us, we acknowledge ourselves to be poor sinners and we address ourselves to the 'Mother of Mercy,' the All-Holy One," (CCC 2677).
Devotion to Mary: "The liturgical feasts dedicated to the Mother of God and Marian prayer, such as the rosary, an "epitome of the whole Gospel," express this devotion to the Virgin Mary," (CCC. 971).