In a passively mindless world, where people called "heroes" don't give a shit about anything, and have less reason for their actions than a concussed duckling, a hero of darkness chooses to start a journey of doing nothing, gets betrayed, and equally chooses to do nothing!
A new journey of pointless wandering, while claiming to care but never following through!
If apathy, this manga!
Also, skip chapters 23 through 35, entirely; it's 10 chapters of not-quite fighting, while the characters don't try very hard to win. They do let everything get destroyed, and act like it's a big deal, but they don't try to stop it.
Apathy as a guiding principle!
Who cares for win!