What? He's speaking the truth. People keep using shotgun or the fusion rifles and it's annoying.
You have one too, use it if you feel it's the OP way to win. I use a HC & AR and rarely ever die to a shotgun unless I'm knee deep in a shit storm at a control point.
If you're getting killed by corner camping shotguns in this game, then I don't know what to tell you. The game gives you so many abilities to not even have to worry about that type of player. I rarely ever see people trying to corner camp anyways.