Oh thank god I'm not the only one feeling this.
They're all acting like they're above Garou and somewhat Saitama even though the only ones who did something in end was Saitama, Bang and Fubuki.
Lets be honest here, the only one that did anything was Saitama. This arc is like the Freiza saga, Garou is Freiza, Saitama is Goku, Garou's team are the Ginyu Force, and the S-Rank Heroes are all Krillin.
As for the Heroes wanting to end Garou, well, they're S-Rank heroes, the cream of the crop, and they got shat on by Garou. Right now their egos must be taking a severe hit. It's like Kim Jong-Un after one of his threats failed. In their mind their rocket actually made it to space and they're still great people, where in reality their rocket crashed after a few meters and they're just scrubs (link for anyone who didn't get the analogy).