They don't have to do anything. Just don't suggest new plot points and names in the last few chapters and let them be. And even if we knew the outcome, wasn't that what we knew from the start? Even after Ceasars shot and r*ped the MC, we knew he'd have his damn redemption arch, or more like pretending that it never happened. A lot of plot twists in this manhwa were somewhat predictable, but that doesn't justify ending it completely without their solutions.

Like what about leonid? Or Ceasars's cousin? I want to see how their plots end. What about Ceasars's mom? You can't just drop her on the last chapter then end it