@tremor3258 The people the hero get in their harems are problem people. All of them are garbage, which is why our main character deals with them by killing them. The goal though is reformation, help those NPC be better which in turn will make the world better as the hero leaves and the reformed NPC will be better rulers. The aim was never for the heros to save the world by themselves.
@flaslt
Thanks, your explanation cleared things up. I missed the point that he was immediately pulled into this ongoing event, and so couldn't be sent back to Earth.