[Autumn]

It has nothing to do with a shotgun's accuracy, shotguns hit fine, they generally have low critical rates and low range, as was said.

Instead, this has to do with excel sniper and jackhammers sniping you from afar for half your healthbar, and then the person wielding them remaining completely fine because of the effects the shells carry, however, keeping the identity of a shotgunner as a really bursty type of gunner, the burst of a shotgun gunner is going to have much more limited range than the burst of an excel sniper gunner, etc. etc.

This is why the nerf has to do with the shell effects a shotgun can carry compared to a sniper set, shotguns are barely run at the moment because the other guns do their job better.