Hello Doubtful, & welcome!
Well - let me try to address each of your points:
Firstly, invocation of the saints has been a common practice since the dawn of Christianity. It’s funny that people will encourage others to pray for themselves and their loved ones, but they won’t ask the very Mother of God, who is in Heaven with Him, to do the same?
Christ was Mary’s Savior just as He is everyone’s - that does not mean she sinned. How would she have entered Heaven had Christ not opened the gates through His redemptorative act? The gates of heaven were closed to all, even Moses, Abraham, Noah and all the Old Testament saints, until Christ re-opened them.
Christ says, "ask and it will be granted." But that presupposes the asker is asking for the right thing; that his will is properly in line with God’s. That’s not a good presumption. But we can be certain that Mary’s will is identical the that of God’s. Again, we have the example from the very Bible you point others to of the Apostles asking for Mary’s assistance at the wedding in Cana.
You look for a good solid Bible teaching at Mass - but that’s not the purpose of the Mass. We worship God at Mass by offering up the sacrifice He made on the cross. Worship requires an act and the assent of the will, not a scripture reading or a jamboree.
Reading biblical texts at a Mass is secondary to the primary purpose of worshipping Him.
That being said, the Church has always recommended the Bible to people; it was the Church that brought the Bible together for our benefit. What the Church does NOT encourage is private interpretation. And the Church’s wisdom on that matter has been proven by the many sects and wayward belief systems that have been created by mere men through such private interpretations.