I don't understand. They have a super genius in magic, a one of a kind miracle that could change the world, but she doesn't like magic... so what do they do, they force her in tedious classes, bore her to hell and make her do the same practical exercises that the rest of the class do... which is utterly pointless for her.
I hope she destroys the professor, then goes slightly berserk and inadvertently nukes a mountain or something like that, just so that the kingdom understands that not even the full might of the whole army can stop her.
Then, maybe, they'll do something interesting for her, like personalised exercises that actually pushes her to try, at least a bit.
And just let her practice her swordsmanship... By prohibiting her that, you'll just make her hate magic more.