Besides, no one is arguing that Mary wasn't blessed, after all she attained the desire of women. But to elevate her to co-redemptor and Queen of Heaven is a notion that perhaps well-meaning, but certainly misguided, humans have come up with.
Mary is described as Queen of Heaven in the Apocalypse, the chapter and verse escape me at the moment. Yes, Mariology overall is something built up on the scriptural foundation but not fully dictated by it.