i see where ur coming from. the sister thing is also unpleasant yeah...
Viewing post in I Hate My Waifu Streamer comments
Thank you for understanding. If you play the game carefully, you'll notice that both the sister and Mio show signs of psychological issues. They each have traits that are both pitiful and detestable. But family definitely deserves better treatment from the protagonist than someone he fell for online after just a few days. That’s why I prefer the revenge route—let Mio go to the underworld and have a proper conversation with the sister.