There is no support for any of the veneration or assumption of Mary. There is no support for praying to or through those who have left their earthly bodies. In fact regarding the veneration of Mary, Jesus renounced that and the references to contacting the dead are called an abomination by God. Just two examples.
That is a matter of your opinion which is based on a canon and tradition that differs than mine.
By what authority do you claim to determine the only relevant truth that God wishes us to have?
To say that Jesus renounced the veneration of Mary because the woman said,....
“Blessed is the womb that bare thee, and the paps which thou hast sucked.” KJV Or as other translations say, “Blessed is the woman who gave you birth and nursed you.”
....is to say that Jesus contradicted Scripture when Mary says that all generations will call her blessed after Elizabeth has called her blessed.
Jesus here is saying that Mary was blessed to carry and give birth and to suckle Him BECAUSE she heard the Word of God and obeyed. In the same way we do what Mary did, we too will be blessed.
And gee, once again, asking the saints who have passed through death into life with Jesus for intercession is not the same as contacting or calling up the spirits of the dead for knowledge of the future for earthly personal gain.
And gee, again, that you believe there is no Scriptural support for those doctrines is a matter of your opinion based on a tradition different than mine.
And again, by whose authority do you deny my beliefs and traditions?