Okay, so first
Laugh with me... Your baby is a mess.
Let's start with the black ( bronzing ). I know she is a big player and loves to roll over so we are going to ignore the black marks as those will molt and grow in new. Those are "bronzing" marks caused by constant wear to the area and/or old feathers that need to molt. Very common in baby macaws and I saw it in my guys until they were around three years old. It got better at 2 but was still there until about three.
My concern is the V shaped feather pieces on the floor of her cage and also the v shaped feathers on her chest. When feathers molt they should be completely intact. Feather shaft to feather tip, they do not molt in pieces.If there are pieces she is chewing them or they are breaking. I only say breaking because obviously she has massive wear going on and it could be possible that they break... not likely but possible. It looks to me as if she is chewing pieces off. Have you seen her do this? Is her beak giving her trouble with properly preening?
Let's clean up the cage and see what she does in a 24 hour period. Okay? Save al the feathers that come of her for 24 hours and give me a picture.