[ Sadly, whatever Souji's intended reasoning was, it's lost on him the moment he asks that question.

Heisuke knows it's probably not the sword style but himself that's to blame, because he's weak and smaller than everybody else. Weak ronin, he can handle with ease, but someone who might have a clue? Not so much. He gets thrown around too easily and the enemies he's faced here have been able to get the drop on him thanks to sheer number. No, it's not the style at all. ]

...I didn't ask to be smaller than everybody else. And it's not my fault I'm not as strong as everybody else, either.

[ Unfortunately, it also means he's not entirely understanding the rest of what Souji says. ]