I guess it’s Solo Leveling, not Subtle Leveling. In case you’re wondering why Hwang (the one whose brother was self defended to death by protagonist-kun) is basically a punching bag at this point in the story, it’s because he’s a traitor. This concept is probably unfamiliar to people who live in NA or EU, but basically, Hwang leaving South Korea to go work for the US is seen a treasonous by most Asian standards, even though it’s legal. It’s a little too on-the-nose, to be honest.