A pathetic protagonist is pretty much a given for shoujo, but what I dislike even more is how illogical she is. She never hurt anyone with her power, and, stunningly, she can't come to realize that.
Regarding the main girl's character developmentally, the story also doesn't make much sense. Like, she would have learned extremely fast that yelling out "YOU'RE LYING XD!" at everything was socially unacceptable. But it shows her doing it incessantly in the village, even though we can assume the negative consequences were apparent from a young age. Her getting into a negative feedback loop in her development is a breach in logic. It's the same way kids learn not to pick their noses in front of people. It might make sense if the main girl had, say, autism, but she doesn't.