Yes, there are. For example, 'One Punch Man' has a similar theme of heroes and their adventures.
It could be that the hero's goals changed, or they found a better way to contribute that didn't involve the usual heroics. Also, external circumstances might have forced them to quit.
Maybe the hero got tired of all the challenges and drama. Or perhaps there was a personal reason that made them want to step away.
Maybe the hero got tired of the challenges or faced some impossible situations that made them give up.
Maybe they got tired of the constant battles and challenges. It could be that they wanted a break from the pressure and responsibility.
Maybe the hero was facing too many challenges or lost interest. It could be a combination of factors.
It could be that the storylines became repetitive and the hero lost interest. Or perhaps there were personal issues in the hero's life that made them decide to quit.
It's hard to say exactly. Maybe the hero's goals shifted, or they faced overwhelming opposition. Could be that they just needed a break from the action. The author might have had a creative vision for this plot development.
I'd recommend 'Legendary Hero Returns'. It has a similar theme of heroes and their journeys, and the style of storytelling is somewhat comparable.
It's about a hero who decides to give up their heroic deeds a while ago and the adventures that follow.
Maybe you lost interest in the story or the gameplay wasn't as fun as you expected.