I don't know what the hell kinda webcomic you were reading. In the webcomic, Amai Mask has a badass entrance where he's carrying an enormous boulder and hurls it at black sperm. Then he takes on black sperm (who was a much bigger deal in the webcomic) while all the other S-Class heroes are on the sidelines thinking of a plan to defeat Evil Natural Water. Atomic Samurai (who hates complimenting lower ranked heroes) even admitted that Amai Mask is very strong and is S-Class level. He was doing really well against black sperm (in contrast to Atomic Samurai who got spanked in two seconds) and only started to lose when Evil Natural Water and black sperm ganged up on him. Even then, he didn't fall, and simply shrugged off the damage and was ready to fight some more. He had some other cool scenes too such as one shotting the webcomic counterpart of DO-S, whereas in the manga, ******* DO-S survives Amai mask lmfao. The point is, ONE clearly intended to make Amai Mask a much bigger deal in the webcomic, whereas in the manga he didn't do shit and only got fodderized by Fuhrer Ugly and that was it. He literally didn't do anything after Fuhrer Ugly beat him. It really goes to show that Murata was not lying when he said he doesn't like Amai Mask.