I can't remember a battle shounen where the humans are portrayed so badly. The look on Netero's face is a proof of that.
Chimera Ant's arc is a masterpiece, really ambitious. The narrative is awesome. You have the characters with their thoughts and impressions of the situation and the addition of an omniscient narrator clarifying the complexity of the invasion and emotions of all involved.
For me, the most well constructed arc on battle shounen. I can't imagine myself waiting for months to read one chapter. Well, guess I'm on the club now, since the manga stopped at 349 for a hiatus.