Christians have always prayed to the Blessed Virgin Mary and held her up as the Christian par excellence, the best example of a follower of Christ
Christians who were persecuted by the pagan Romans and the pagan Barbarians
but over time, the civilized pagans of Greece, Rome, and Egypt become converted to the true faith of Christianity
and one by one the Barbarian tribes of the Franks, Saxons, Celts, Danes fell to the love, piety, rationality, and truth of the Christian religion
Christianity, armed with the faith in Jesus, the wisdom of the Bible, the leadership of valid Bishops, the sustaining grace Sacraments, and devotion to the Saints in heaven who pray for us here on earth, was first persecuted by the pagans, and then overcame them with Love and Truth
then after the pagans were converted, in both a culture, place, and time very far removed from the the what the first Christians would have known, we get people telling us that it is not good to pray to the Saints, seeking to say that Mary was not a Holy Virgin her entire life
were there missteps along the way?
sadly yes, the Church in East neglected to convert the arab tribesmen
as punishment for this God allowed Islam to rise up among them and they became a great scourge to the Church punishing us for our failure to spread the Gospel to them
at times the Church in the West neglected the common folk, focusing more on clerics and princeses
as punishment God allowed Cathers and Hussites to rise up and become a scourge to the Church punishing our neglect
so yes, mistakes were made, but to be told by members of a religion that was made up 500 years ago in Northern Europe that it is not "Christian" to pray to Mary and the Saints is beyond the pale
asking us to abandon our Faith, the Faith that withstood the swords of Roman and Barbarian
not only withstood but also in time converted those people
only to be told 1500 years after the time of the Apostles that these ways are are not true, after they have withstood the test of time
till this very day the majority of Christians hold these teachings to be true, in Russia, in Greece, the remaining Christians throughout the Levant and Arabia and North Africa, and a majority of Christians in Europe
the Catholics, Eastern Orthodox, Oriental Orthodox and some of the more traditional Anglicans all hold true to this ancient Christian belief in the intercession of the Saints and the special role of the Virgin Mary, it is only a minority of Christians who follow these theological innovations that are foreign to the Early Church