
Yeah, Miran's story is sad and all but... She's aware herself that she's not a nice person. You can try and justify her actions, but you can justify them to a certain extent. She's shown no signs of actually wanting to change...
And you can't even blame the sister for her complex, since she's always been so nice and supportive of Miran. Her parents are a bit to blame, yeah, but still, Miran has never tried to be better, friendlier, less selfish, etc.
Thanks for the meal ~