I think it's better that despite his skills, he still makes mistakes. It proves that he didn't learn *everything* back in his previous life, and makes him a less "faceroll all enemies" character like most fantasy manga.
I'm going to assume the MC's mental abilities also reflect her age, just like her physical abilities...
Else, the MC is fucking dumb or overconfident, but mostly dumb.
better than most isekais, considering he's not ridiculous overpowered and is making human mistakes, especially since he spent like 10 years as a kid without a danger in sight
Okay, I only read the Oneshot, but what is up with this pacing? It's like the author wanted to add a backstory, but also wanted to get straight to the main story, so they just half-assed it.