You are assigning human attributes to God. God is not "concerned" or "upset". Things are happening just as He so willed it to be. He doesn't get concerned about anything nor does He get upset. He might in His holiness regret the course that events must take to accomplish His will. But He is willing for it to take this course even to the death of His Son so that some whom He has foreknown and predestined obtain eternal life and to join Him.
We pray for the conversion of sinners just as Noah preached to a world where he knew only eight would be saved. We don't know if God's mercy will extend to others or if He will come back tomorrow. We don't do so because the "Blessed Mother" requested, but because God tells us to. It is good for us to have the same compassion for others as God has for us and prayer is a way to help us develop compassion.
1 Samuel 12:23 Furthermore, as for me, far be it from me that I would sin against the Lord by ceasing to pray for you; but I will instruct you in the good and right way.
Jesus is both divine and human. God is love and wants us with our free will to love Him. Jesus suffering on the cross were certainly human attributes.
God wants all to join Him in Heaven. God is concerned and disappointed when many reject His love. I would listen to the Blessed Mother of God. She may have good advice and her prayers are beneficial.