Toxic masculinity? He fought because he didn't know what else to do, and he hated his rival because he couldn't defeat him when he tried, and got humiliated. Deep inside, he feared the fight, because he knew that he couldn't lose again, that's why he didn't care if it was a fight to the death. In the end, he decides to stop fighting because it's pointless. He discovered by talking to his opponent that they weren't that different, as he also feared their encounter. While he could have continued the fight; just like his rival once couldn't break his limbs, he couldn't bring himself to end it, because he no longer saw meaning in their fight, he had overpowered him, and didn't need to hurt him anymore, there was enough bloodshed in his path, and at that moment, it all seemed meaningless to him.