Oh my, I can't imagine how frustrating this must be for you. She shouldn't let anyone tell her if she's good at her art, certainly not to a school. You can't teach art and especially not talent at any school. The only true way for an artist to grow is by practicing and exploring her ideas and curiosities. Even if it turns out they suck sometimes. That takes tremendous courage, more than they could ever teach you at any institution.
I hope with all my heart she doesn't allow those nitwits to put her off. Because if she does, she's gonna wonder all her life what it might've been like if she'd stuck to it. But with a mother like you, I'm sure she's a smart, well-based girl, so I do trust she'll see the light.
Yes, fingers crossed it doesn't put her off. Thankfully the problems aren't directly to do with her photography work itself. She always had a good eye for photos, even as a child, so I'd like her to retain some confidence there.
Confidence grows when tested <3