@liquidxlax it's fucking fantastic precisely because of how he works around being powerless. You should really give it a try. The only power he has is the ability to respawn, but only he remembers what happened. It's groundhog day but only triggered on death. It for sure gets extremely miserable at points, but he then has to figure out how to avoid his misery. It's an incredible series, one of the better isekai out there no question.
It is not power fantasy, indeed he even tried to be the typical isekai protagonist bur quickly finds himself extremely outmatched. But that does not stop him from trying despite the odds, and the strength of the people he loves, and the people who love him, is what elevates it above most other isekai series. Like this one, Ossan, is okay at best, but it's just slightly above pub food in terms of quality.