Well... Gunzou is a genius... but he is also a child, his brain isn't fully formed, expecting complete logical behavior from him is to completely ignore that fundamental fact.
I kinda did the little redesign on Gunzou, he feels more like a teenager now... in body proportions at least, boy still is a little too robotic with a few of his mannerisms.
When the reveal that this whole situation is some sort of test from an unfathomable being that tracks back to the origin of reality happened, I will admit, it felt a little too much... but then that same unfathomable being got a crush on one of the girls in the cast and is stalking her now XD.
The author wisely took a few steps back after that reveal, IIRC (because it has been some time since I read that part of the story), we had a few big fights after the reveal, but slowly we got back to the character driven side of the story.
Frequently, when a story has a plot like that, it completely forsakes the character side of the story, which obviously... only has negatives for the narrative, a good story is a healthy mix of world building and character development