This makes me wish all the more that the manga would have followed the webcomic more with this fight. I don't mind the cool and different designs Murata had, but I would have preferred to see choreography like this. Even without the explosions and Low 5-B+ feats, it feels more impactful, and also highlights Garou's martial arts skills more. I don't care if fights are primarily melee, or a slew of crazy hax and abilities being used back to back, as long as they compliment the story that's being told. If they really wanted to have Garou quit because he realized Saitama is too strong, they should have communicated that more in the fight, something that the webcomic clearly does better. Garou should have been hit more, getting back up out of sheer crackhead determination, and kept fighting like the webcomic did. Heck, they could have had Garou be a mathematician while he fights, crunching the numbers in his head to see how his rapid evolution stacks up with a casual Saitama and constantly seeing that the values are overwhelmingly in Saitama's favor.
Fights are just as much of a catalyst for a story as conversation and character interactions. Wins and losses against other characters with conflicting ideologies (or any character in general), could shape the character's outlook on life. For example, in Metal Gear Rising: Revengeance, Raiden and Armstrong fight each other while divulging their personal philosophies on the world, and it even results in Raiden taking in some of Armstrong's ideologies, even in spite of winning the fight. In the Marvel Secret Wars storyline (the very first one), Spider-Man one-sidedly beat the tar out of Titania, resulting in her having a fear of Spider-Man that she would have to face much later when she crossed back with the wall-crawler again. And there are so many other examples of that being done right. I don't think the manga portrayal of the Saitama VS Garou fight was one of them after getting more info on it.