This was not a Marvel story at all. It's like it was created for something else but didn't get picked up. This was more like an original Disney film but was refashioned to have some Marvel elements in it. But the source of her powers could easily have been something other than the Tesseract.
It could've worked well as its own independent story unconnected to Marvel. It could've been like Pocahontas or Mullan or Moana. The Marvel bits felt tacked on, but because it was presented as Marvel story you expected it to have more Marvel elements. I think it ended up doing a disservice to both.