One thing I want to say about this is almost every paragraph here is you pointing out the Joke of the show, that Saitama is just overwhelmingly strong to the point of absurdity.

Were you to not mention that so often, there would be very little of this article to actually read. If you want to go in depth on a character at all, I'd suggest actively trying to make the article a bit more varied in terms of what you are talking about to avoid repeating yourself so much.

Saitama himself has plenty more aspects you could delve into here, including his relations to other characters.