These are the types of chapters that really ground you into OPM's parody. One & Murata spend chapters on end building up the villains power, and, in the end, it means nothing in the face of Saitama's unlimited strength lol.
Upon reading the spoilers, I was disappointed at Gouketsu being down so quickly, and off paneled no less, but then I looked at it from the perspective of the parody, and came to the conclusion it was more my inner Shonen fanboy that wanted to see more of Gouketsu.

Other than Garou and Boros, OPM does not really give that much characterization to its villains, because that is the point of the joke. There will always be more villains of varying strengths, but when all's said and done, Saitama will beat them all, with one punch (minus a few) at that lol. That being said, the chapter was hilarious, and Saitama shows once again he is the perfect MC for this type of series. I am also looking forward to Suiryu returning at some point down the road as a hero, this was nice development for him.