
It seems as though you’re bringing modern ethics into a historical world, where societal norms are very different. When someone commits a crime they are jailed and or killed. Mo Yong stated that all the people he had buried alive were thief’s, murderers, etc. Those people would’ve been executed anyways for their crimes. And we find out later that all of them survived, they all just lost some life energy, which comes back with time. Furthermore, in martial arts worlds the strong rule. There is no right or wrong like we have irl modern society. Those things aren’t always the only contenders to whether someone lives or dies. Sometimes it’s simply them losing a fight and being weaker than the other. Sometimes it’s revenge, or justice, or maybe just for fun. There might be laws the general public follows, but the government can’t enforce those on such overpowered martial artists. So, saying that Mo Yong is a terrible person isn't just white and black. Even irl modern society there are laws for executing criminals. Mo Yong just used those people to his own advantage rather than having them dead or rotting in jail.
Lastly, just because you don’t like one character doesn’t mean the whole thing is bad. I’ve read many stories and majority of them I don’t like at least one character. There’s always one that pushes the boundaries, because that’s what makes it entertaining. It’s the whole point of the story. The author has to create drama and that’s just one way it’s possible. It allows readers to have a common enemy, to ask moral questions, be interested in the plot, etc.
Even the dad is goddamn angel compared to that fucking scum of an ML. Are you people that low on reading comprehension and logical reasoning? Are you that much of a slave to what the author feeds you that you can't reason for yourself? If anyone had done to your so-called good guys half of what Mo Ran did to others, they would've been made out to be irredeemable villains and y'all would've been cursing them out in the comments. What a shitty story. The plot was meh and lacklustre throughout. I only read it for the brothers but it ended with throwing a pity party for an already less than sympathetic MC and justifying that monster's action with nothing more than a "because I said so.", leaving such a bad taste behind. Garbage. Would've been much better as a shounen with the littlest brother as the protagonist who eventually has to bring justice to the people by defeating the man who used to be his master. If you want to send out the message that it's okay for your protags to screw over others horribly in order to benefit themselves, then don't portray other characters, who haven't fallen nearly as low in doing unto your protags what they have already being doing to others, as villains. Amorality for the protagonist, morality for others is not cute.