This is not an issue with aCoC, it applies to everything in One Piece.
Sandai Kitetsu gets introduced - cuts more than it should, never gets brought up again. Intro hype, dead soon after.
Shusui introduction - creates bigger slashes, happens never again after TB arc. Intro hype, dead soon after.
Enma intro - "muh Oden's haki", troublesome gimmick during Wano, will never be brought up again. Intro hype that is about to die.
Future Sight - the unstoppable ability of "invincible" Katakuri. Intro hype that died in WCI when we saw AOE/speed shits on it.
Internal destruction - erasing ppls insides, dead within the same ard, shat upon by aCoC.
aCoC - ability of handful of very strongest, ends up scaling to lethality, from lame to impressive. Will be stopped by aCoC-less people.
So, yeah Fishy, everything is fraudulent in One Piece.