Truth and justice aren't outdated. That's laughable excuse . As for American way it was added later when superman became a brand. I don't particularly think its bad . He is entirely boring. His powers aren't presented in a good way. His fights lack choreography . He doesn't have the personality or the fire. He went from a strongman to a sun god who drinks sun juice. His portrayal seems to be either naive or atworst paternalistic.
What type is that? A swashbuckling hero. There has been a swashbuckling rootin tootin son of a gun since the western genre and pulp was a thing. Modern Batman is a swashbuckling hero. As for currently, demon slayer's tanjiro is a thing. They are a little more shy. That's it.
Luffy is still loved and the manga sells very much.