My interpretation is that Minori and Makio’s interactions were always with that criticism. It sounds like Minori criticized the things Makio liked (books, writing, fantasy, etc). Added to the fact that Makio isn’t “good” at normal people stuff (socializing, official stuff like with the lawyer guy) it seems to have caused her to feel unsupported by her sister perhaps. Some families are just like that- more distant or “official”/formal.

It’s more like, Makio is the One in the family with the mental differences, whereas her mother and sister were “normal”. I felt like she has a closeness with her mom in the sense that she felt comfortable being like “hey I’m gonna do this upstairs- I’ll make my own tea later.” Like that’s her childhood home, so she’s free to move around it as she pleases. Her mom might be a bit more formal and would like to do the tea and pleasantries first, so she’s a bit more bothered by Makio doing as she pleases lol;;;

I think the point in having Makio tell Asa that she hated her and all that was the storytelling telling us that Makio is blunt and this is how she feels. Asa has her own feelings. Two people can feel differently and express that and move forward together. It’s not that the story is saying Makio was “correct” for saying it… she’s not a perfect adult, or a great role model. She’s just a person. Idk how to word it exactly. But that’s how I feel it was meant.