"that to serve Mary and be Her courtier is the greatest honor we can possibly possess;
for to serve the Queen of Heaven is already to reign there,
and live under Her commands is more than to govern."
Who is the Queen of Heaven?
https://www.gotquestions.org/Queen-of-Heaven.html
Jeremiah 7:16-20 “As for you, do not pray for this people, or lift up a cry or prayer for them, and do not intercede with me, for I will not hear you. Do you not see what they are doing in the cities of Judah and in the streets of Jerusalem? The children gather wood, the fathers kindle fire, and the women knead dough, to make cakes for the queen of heaven. And they pour out drink offerings to other gods, to provoke me to anger. Is it I whom they provoke? declares the Lord. Is it not themselves, to their own shame? Therefore thus says the Lord God: Behold, my anger and my wrath will be poured out on this place, upon man and beast, upon the trees of the field and the fruit of the ground; it will burn and not be quenched.”
Jeremiah 44:16-25 “As for the word that you have spoken to us in the name of the Lord, we will not listen to you. But we will do everything that we have vowed, make offerings to the queen of heaven and pour out drink offerings to her, as we did, both we and our fathers, our kings and our officials, in the cities of Judah and in the streets of Jerusalem. For then we had plenty of food, and prospered, and saw no disaster. But since we left off making offerings to the queen of heaven and pouring out drink offerings to her, we have lacked everything and have been consumed by the sword and by famine.” And the women said, “When we made offerings to the queen of heaven and poured out drink offerings to her, was it without our husbands' approval that we made cakes for her bearing her image and poured out drink offerings to her?”
Then Jeremiah said to all the people, men and women, all the people who had given him this answer: “As for the offerings that you offered in the cities of Judah and in the streets of Jerusalem, you and your fathers, your kings and your officials, and the people of the land, did not the Lord remember them? Did it not come into his mind? The Lord could no longer bear your evil deeds and the abominations that you committed. Therefore your land has become a desolation and a waste and a curse, without inhabitant, as it is this day. It is because you made offerings and because you sinned against the Lord and did not obey the voice of the Lord or walk in his law and in his statutes and in his testimonies that this disaster has happened to you, as at this day.”
Jeremiah said to all the people and all the women, “Hear the word of the Lord, all you of Judah who are in the land of Egypt. Thus says the Lord of hosts, the God of Israel: You and your wives have declared with your mouths, and have fulfilled it with your hands, saying, ‘We will surely perform our vows that we have made, to make offerings to the queen of heaven and to pour out drink offerings to her.’ Then confirm your vows and perform your vows!
God clearly condemns worship of the queen of heaven because it's worship to a demonic entity.
Catholics assigning this title to Mary are essentially admitting they are worshipping a demonic entity and thus putting themselves under God's judgment.
They need to think things through before running off willy-nilly with stuff they like the sound of.