Karu had indeed hit rock bottom.
In the wilderness, each bandit stake out their territories. The weaker ones can only roam the most dangerous borders of the wilderness, stealing when they can while dealing with the periodic roundups from the Bimon army.
However, things are different within the wilderness. The vast and expansive wilderness is the perfect hideout, and the orcish army of Bimon simply doesn't have the time and energy to clear out such a large area of goblins and ogres. Therefore, the robbers within the wilderness are proliferating like gadflies, whimsically treating the wilderness as their paradise. That's why the goblin and ogre tribes in the wilderness consist only of the most brave and resilient warriors. For an ageing and physically weak wilderness bandit like Karu, barring a sensible decision to leave, the only fate awaiting him was to be killed by his own kind for food.