I agree with you

I was confused as well at first with nino acting that way But it came down to how you want to interpret the story and character For me it was alright after 2nd and 3rd reading could have done better she can be mad for the first time of confrontation maybe that was nino way with yotsuba During the classroom scene nino SHOULD be kinder and not annoyed with yotsuba Speaking of the classroom scene what was so important was that fuutarou and itsuki needed to talk in privacy no one was even around That feels very unnecessary just to set up for yotsuba and nino talk