It looks like she doesn't have a lot to use in order to get her shed off! I had seen some of the same problems w/ shedding, and I think that incomplete shedding (when good humidity is present) can sometimes be due to the snake not having enough 'rough' things in their tank. For this reason I bought my snake a bark-covered hide and a couple pieces of driftwood / bark, which helps them with their shedding process.
She may just be a bit more nervous/irritable/frustrated due to her stuck shed or just her shedding process in general. I have heard that some snakes will be harder to feed when in shed. Here's some things you might try:
-I like feeding my snake when he's on the cold side of his tank, as I've heard that it helps them to distinguish the heat signatures.
-Go up in sizes (if you have the option) in mice, just to try to get her back into a healthy weight before trying w/ rats.