SPOILERS ahead:
I felt like there wasn’t really enough of an explanation of how Wanda got such crazy powers. They seem to come from nowhere…her grief maybe. I don’t know how the comics handle it, but I feel like something was missing on that score.
Other than that though, it was amazing! And the after credits scene… Just when I thought it couldn’t get crazier.
My interpretation is that she was born with powers and that the more trauma she goes through, the more powerful she becomes.