That's the problem with probably 99% of buff/nerf complaint threads in all of CoD; much of it is done by people simply belly-aching that they got killed (multiple times) and the person who killed them happened to be using a certain weapon/attachment/etc, so in their inflated ego mind, it MUST be because of that weapon/attachment/etc. and not their own poorer playstyle/reaction time/etc. and/or that other person's better playstyle/reaction time/etc., thus those people complaining can never really offer anything specific about why something should be buffed/nerfed aside from things like "it killed me too quickly/didn't kill the enemy quick enough!" or "Everyone is using it, so why would they if it's not OP?", and such while doing nothing but repeating those reasons and outright denying anyone else who counters their complaints with actual in-depth explanations for why it's not OP.
People just NEED something to blame EXCEPT themselves.