Mary is a sinner in need of a saviour just like the rest of mankind.
I don't know you; forgive me if this sounds harsh, but there's no pleasant sounding way to warn a swimmer of a shark.
All of your harping would be so boring and long-winded if it weren't so dangerous. From the first pages of Scripture, God has announced the enmity between the serpent and "the woman", between the serpent's seed and the seed of "the woman" (cf. Gn. 3.15). And every time I see Protestants, out of their zeal for the worship of the one God, drag down into the mud and stomp upon the dignity of the Mother of Jesus (the only woman with seed because of her ever-virginal motherhood), I can't help but hear Christ's words directed toward them: "You are of your father the devil, and your will is to do your father’s desires. He was a murderer from the beginning, and has nothing to do with the truth, because there is no truth in him. When he lies, he speaks according to his own nature, for he is a liar and the father of lies" (Jn. 8.44).
No one denies that Mary needed a Savior. She said so herself (cf. Lk. 1.47). But, typically, even if we see others sinning, we don't call them sinners or think badly of them, because we recognize, as Paul did, that each of us ourselves is the foremost among sinners (cf. I Tim. 1.15). So why do you think you have the right to take your eyes off your own spiritual misery and heap insults on Jesus' Mother? Do you think Jesus is impressed?
No, he's not impressed. He is impressed when a woman cries out in a crowd "Blessed is the womb that bore you, and the breasts at which you nursed", and rather than contradict those words, he amplifies them by declaring blessed those who hear the word of God and keep it (cf. Lk. 11.27-28). No one in Scripture heard the word of God and kept it better than Mary, who heard God's word with the ears and heart of faith and brought it forth in her manner of life even before she heard God's word through the angel with the same ears and heart of faith, bringing forth God's Son made flesh, flesh of her flesh, bone of her bone, blood of her blood. It was because there was no one who heard the word of God and kept it better than Mary that God chose her to be the mother of his Son; he didn't just scour the world looking for an incubator and say "That Jew will do."
LBK and others have given you a lot of Scripture and a lot of ideas from Scripture to consider. If you are really interested, interact with that material, as others in this thread have, who may not understand at first but are willing to ponder and learn. No one expects you to understand or believe immediately, but there's a way to seek understanding and then there's simply the obstinate refusal to believe nothing but your own wisdom. Don't do the latter.
When LBK wrote about the role of the Queen Mother in the OT, I couldn't help but think of the Wedding at Cana (cf. Jn. 2.1-11). When Mary approaches Jesus with the problem of the lack of wine, he at first doesn't seem disposed to do anything about it: he tells her that it's not their concern, and that his hour has not yet come. But Mary's insistent plea for her Son's help takes on another form, as she prepares the servants to "do whatever he tells" them. And Christ, even though his hour had not yet come, advances that hour--alters his schedule and plan, as we might say--to provide wine for a wedding (relatively unimportant in the grand scheme of things), because it meant so much to his mother that he help. He advanced his approach to Calvary in order to answer the seemingly insignificant request of his mother. Are we to believe that he won't listen to her when she asks for even more important things?
And at Calvary, on the cross, he thought of his mother: "When Jesus saw his mother, and the disciple whom he loved standing near, he said to his mother, 'Woman, behold, your son!' Then he said to the disciple, 'Behold, your mother!' And from that hour the disciple took her to his own home" (Jn. 19.26-27). Now, we believe that this "beloved disciple" was John himself, but it's surely not an accident, but the intention of the Holy Spirit, that he is not named, but is simply "the disciple whom Jesus loved". Jesus gives his mother another son: his beloved disciple. And the beloved disciple receives a mother: Jesus' own mother. If we would be another of Jesus' beloved disciples, how can we ignore the gift he gave us in his mother, his dying gift to us from the cross? If we would be another of Jesus' beloved disciples, how can we not but take his mother into our own homes and lives as immediately as that beloved disciple did?
As Fr Thomas Hopko taught in a podcast I can't recall right now, "Mary is a mystery of the Church". Only when one has truly accepted Christ with faith and repentance and become a member of his Body through baptism and the Eucharist can they understand Mary. She doesn't make sense to those outside the Church, to those who are not members of Christ's Body; maybe that's why the Devil and his children hate her with such passion. If you are not Christ's, then Mary will never make sense to you, and that is your choice (i.e., to remain outside the house instead of joining the family). But don't think you can get away with ridiculing things as important as Mary just because you don't understand them. No man likes it when you insult his mother, much less the God-Man, and I wouldn't recommend annoying him: "Your mama" jokes always end badly. Edited to add a citation.