@Pokari
I think the first chapter was already quite clear as is. Unless there was an edit to the chapter between my reading and yours.
Plasticman came in intending to kill this new unknown person. Before meeting him, he was already powering up everything.
The cultivator asked politely about directions. Plasticman powered up to max, flat out ignoring him. Cultivator asks if he can't understand him, Plasticman pretty much says, I dont give a fuck, I just want to kill you for fun.
They then lore drop that for the last 11 years, heroes are just running around rampant without any threats (they've gone despotic). Then Machoman appears demanding him to become a slave.
Similar things must have happened with the previous heroes the culitivator defeated, hence why he wondered why so many people are needlessly seeking death over nothing.
This practically explains the current state of the world, clarifies that the cultivator is not from here, and directly explains the mindset of most heroes.
What else do you need the author to tell you within a single chapter that isn't already shown from the above? Personally, it seems quite enough world building.