Her claim is that she was the only person to be asked to "prove herself." Her claim is that she was also the only person of color (or the only woman of color, I'm not sure). Anyway, if her claim is true, than she is right to complain. If your daughter was treated like that you'd be pissed! Someone who puts in a ton of work and other people (for whatever reason) think they didn't actually do it?
Now, it could be wrong. (1) she could be mistaken, and other people, were, indeed, asked to "prove" themselves in a similar way. So maybe she wasn't the only one. But the Academy was given a chance to respond, and the did NOT say that. So I'm guessing she's not wrong there.
Or (2), they asked her to "prove" herself (and nobody else) but the reason wasn't because she was a woman of color. This is a generous interpretation for the academy, but I could see it. I could see the reasoning that she was the youngest person among the producers so they "discriminated" against her because of her age, not race or gender. But that's really a distinction without a difference, right? She was treated different from everybody else, and it sucks. That's really the message.
Again, assuming it's true. I guess you could say that you think she's lying, or she is mistaken. But it seems like a weird hill to die on.