>>93883122>>93883317It's deeper than that. The character Garou is, at that point, the biggest threat anyone's fought and he essentially engineered the downfall of the Hero Organization himself, as well as wrecked half of the strongest heroes by himself.
He then fights and gets his shit pushed in by Saitama. Garou, being a martial arts genius, recognizes that Saitama is a complete amateur at fighting, but he is still losing. Garou, through sheer willpower, transforms himself from a regular human into a literal monster just trying to defeat Saitama, but he can't. Completely devastated at how outclassed he is by a hero, the kind of person he hates most, and a total amateur at that, he asks Saitama why he wants to be a hero, what compels him to fight evil.
Saitama literally picks his nose, shrugs, and says, "It's just a hobby for me." To a person so absolutely dedicated and obsessed with villains and heroes that he just turned into a monster and wiped out the hero organization. Then you see that page.
Garou goes on a rant about how absolutely unfair that kind of "justice" is, about how the world was always discriminating against the bad guys and about how pathetic and, essentially, human the heroes are. How they are just normal, failed people like everyone else. So to fix the world, he's going to be the ultimate villain so everyone can unite against him.
Saitama flips the script on him and tells him that's just bullshit and an excuse to act out; he tells Garou he has no desire to be a villain and in reality he just wanted to be a hero, worshiped and in the spotlight, but was too weak or too lazy to deal with the difficulty of being a hero, so he compromised because he had no confidence: he went the easy, cheap route and became a villain. He literally tells him, "Comparing your compromised villain hobby versus my serious hero hobby, I can never lose."
It's the most audacious assbeating a villain has ever received. Ever. Hands down. Read the webcomic it's worth it