The verse is quite clear and as far as I know has not been altered in any Protestant translations. It says, "All generations shall call me blessed."
You and most Protestants refuse to do so and in your refusal you are violating scripture.
I have no problem calling her blessed. Mary is blessed among women! She is The Virgin who carried the Lord.
But you want more, much more.
Mary was blessed. The Lord did great things with her. She was remarkably blessed.
I've said it often and continue to say it. I know others who say the same.
Therefore, your proposition is wrong. Many protestants recognize and say that Mary was blessed.
What are the first five beatitudes?