@exogriz
I think it's safe to recommend reading this manga until chapter 50 or so, in which most of the discovery stages are cleared out.
Afterwards...Congrats on making it that far, I couldn't get past chapter 80 or so. After chap 50 or 60, the entire manga revolves around the idea that: "If we destroy the enemy camp, the island will become peaceful...But that means the story will end because there'd be no opposition! Oh no! Better inflate the FUCK out of that conflict as much as possible!"
And so it was;
A peace loving MC, a friend turned nemesis literally for no god damn reason other than forced drama, the author who's constantly revealing the plans of the bad-guys, while the main characters have to investigate to know what the author has already spoiled to the audience.
The entire manga boils down to: "let's drag this out as much as possible". Go to KissManga and you'd see people defend this manga to their deaths, it's fucking unbelievable.
And apropos that,
@JustNatsuki
Go to the manga's KissManga comments-section, and you'd see people awe-struck about how amazing some of the wisdom the author shares about industrialism and the meaning of life.
This entire manga and everything about it just makes me irrationally angry. I better leave now.