What's funny is when in novels or manga's where the mc is a coward is strongly mocked by the people reading it, while if he didn't injure the antagonist enough most people will scream for how dumb that is. Just kill him or break his legs! But when it actually happens most people will say he had gone too far. At least the ones who comments.
But the thing is, he didn't kill him and the antagonist drove the original owner of the body to suicide that can be seen as semi-murder, but the antagonist also bullied the original owner's body full of bruises and wounds for years long.
So what if the mc breaks their legs? They deserved it. Revenge will always be 10 times worse than what you received. For people who don't see that is just dumb.