You're wrong about an important point here, the main reason the translator and many readers like me are outraged is not because of the portrayal of not morally sound character and violent behavior but because of the author's mindset.
First of all she didn't put a single trigger warning in her work and the most horrifying thing is that she seems to think Minwoo deserves everything that is happening to him and in her head she's imagining Minwoo as her ex! There's something seriously wrong with her head.
If you are so bothered by the little sidenotes then it doesn't take much work to just move your eyeballs to the next panel, there are many readers like me who appreciates them. It feels like I am venting about the story with a friend and the point the translator makes 100% true.
You might not believe but there are many readers who feel the same way as the author so I want the notes to be a wakeup call for them and maybe get help.