Review Detail of kuokyo in Absolute Stealing

First I set 5 stars, now 3. And here's why: in chapter 30, the author ruined the story. I had great expectations for this story. I was hoping that the MC would keep his strength in the circle from everyone, build up strength with his sister, without attracting attention. But instead, the MC did something stupid by showing his abilities to the military. The author, why repeat the story by analogy with "I'm in Marvel"? We already have a story where the MC behaves like a hero of humanity saving everyone around. Me and I think many others hoped to see another development of events in your story ... I'm sorry, but I think that I will give up reading this story ...