I mean, it's the same thing with Futaba. She literally doesn't have a point most of the time, just that either no one calls her out on it or she's somehow right. Which ruins my immersion because it's like the world is set up to make us take her seriously even though, without the setting, she would be a total retard.
Like with Futaba, they point out that it's really easy to tell that it's her and then the conversation just ignores it? And with Io, her explanation of "she doesn't have good relationship with women therefore she must have been raped" isn't complete stupidity because somehow it's true. Again, no one would take Nodoka seriously if the world didn't just magically allow her to be unquestioned and correct whenever it needs her to be so she can seem smart.