The lack of self-awareness of the girls about how they're treating Miki isn't surprising, independently of what Minato says (which can end up being a helpful thing), I'm sure it's a situation where they can all talk it out. After all, Miki has learned to read the room, and what's been stressing her so much is that she's tuned that up far too much for far too long, and I'm sure the girls will still like her even if she lets some of her awkwardness and tomboyness shy through, I'd say they'd like her even more for it. (I hope I'm not wrong

)
Also, the environment of competitive sports is very different from just your classroom and friends, and Miki's not in a situation where she feels she has to defend anyone as well.
Thank you very much for the scanlation!