I know her place in scripture. I’m just uncomfortable with how much emphasis is on Mary in a world where God lacks the proper emphasis.
As for mediatrix of all graces, in my mind the term simply puts Us in a position where we are required to give Mary credit for Gods graces.
I know Mary said yes to God, and I’m grateful. But is her life long sacrifice greater then St. John’s, or St. Peter’s? Or St. Therese? If so… How much greater? And where is the concrete scripture/tradition for the Marian devotion?
Does God want us to love him and be devoted to him? Yes!
Does Mary?
I understand being uncomfortable about the lack of emphasis on God in our world, but I think the issue there lies not with devotion to Mary, but with a lack of devotion to God in general.
We have plenty of tradition in the Church to support devotion to Mary, and I would suggest that there are several verses in the Bible that imply it, as well. (“Honor your father and your mother,” “Hail, Full of Grace,” “All generations shall call me Blessed,” “How is it that the mother of my Lord should come to me?” etc.) Catholics are not devoted to Mary as a mere “good woman,” but as the
Mother of God. That necessarily implies that Jesus, her Son, is truly God, not just a mere man. So even in her title, we see devotion and honor given to God, as well!
I do think Mary’s sacrifice was greater than other saints’. She gave everything, her whole self, her whole life, over to God when she said that, “Yes.” She didn’t understand what would happen, but she trusted Him fully. She never turned away from God, never betrayed Him, never sinned against Him. She loved Him
perfectly. In watching her Son suffer His Passion, she surely suffered more than any other human being–even His closest friends could not have felt the same as His mother would have felt seeing her innocent Son suffer so terribly! As a mother myself, I cannot even
imagine how she felt at the foot of the Cross–I can barely stand to watch my children get a shot at the doctor’s office because it hurts so much to see them hurt!
I think perhaps you also misunderstand what a “mediatrix” is and does. She is a type of mediator for us. Just as we can “mediate” by praying for others, and that does not mean we are the
source of God’s blessing upon that person, so Mary is not the
source of the graces offered to us by God. A mediator should not receive “credit” for the offer made by one party to another; they simply act as a “go-between” to help both parties reconcile; in fact, one definition of “mediator” is,
“one who intervenes between two persons who are at variance, with a view to reconcile them.” Try to think of her role in that way. She helps us to reconcile our relationship with God.
And she is
full of grace; she follows God’s Will perfectly, so it’s not as if God is saying, “Oops, Mary, you weren’t supposed to give My Grace to THAT guy… Oh, well, I’ll work with it.”

Remember that God
grants her the power to intercede for us, to “mediate” His Graces. Mary does NOTHING without God.
There seems implied in parts of your posts that there is a limited amount of love and honor we can have for God, like a pie, and that giving Mary a big slice of it lessens the amount we have available to give to God. But that’s not how real love works. Love cannot be divided–it can, however, be multiplied. And the more we honor the Mother, the more we honor her Son. (Worship, of course, is another matter, and is reserved for God only. But Mary does not want us to worship her, either.)
I’m confused by your last question.
Of course Mary wants us to love God and be devoted to Him, just as she loves Him and is devoted to Him.

She leads us to her Son, and as others have said, she reminds us to, “do whatever He tells you to do.”
Hope that helps somewhat.