She's an extremely disagreeable character or the story is just disagreeable.
Her life is pretty easy as it is, she's rich, she has natural talent, people spoil the crap out of her (including the King), she has a good friend that seems to care about her (even though she thinks of her as nothing but a follower). If she didn't want to study, she should just drop out.
Yeah, isekai characters usually have all the luck in the world but their personalities usually aren't that of a 4 year old kid.