I think it is because she learned how to fight out of necessity. She never wanted to be strong she had to be. As a result now that she has found herself in a more lax situation she is most letting her weaker side show more. Under all that strength she is still just a girl. She still just wants to live a life without conflict. She wants to relax. As a result her sword skills are unpracticed and though her magic is strong since she has beast bodyguards she doesn't need to rely on them. Its a beautiful thing. Sure she is op but only in the sense that she has tried harder than anyone. Now that she doesn't have to she is weaker and I find the vulnerability she gets to luxuriate in beautiful.
i get the trauma with the brother. gotta have some kinda weak spot somewhere. but why was she made out to be this OP character if she ain't done jack shit against anyone this entire time?
like she should have been more than capable of beating the demon's ass if she's got OP magic power. or anyone else's that's messed with her up to this point.
like why is she ALWAYS a helpless damsel needing to be saved by one of her extensively long list of magic harem boys. i understand with the brother cause he's like the last boss for her or whatever, by she's been pretty useless when it comes to saving herself this WHOLE time.
might as well have not bothered giving her OP magic powers if she ain't gonna ever use them! literally nothing else in the story would have changed.
she's still baking yummy food, she's still a healing presence for all her magic harem boys, she's still running away from home, she's still picking up magic harem boy members. didn't need to give her OP magic powers if that's all she was gonna do in this story is look cute, make a harem, need to be rescued again, and bake yummy food.