The Wingman and Peacekeeper are objectively overpowered

Honestly, I feel like you're missing the overall point. The fact is, the majority of people do almost nothing but pick up these 2 guns. Yes get good, aim better, etc etc, blah blah blah.

The issue isn't skill, or lack there of. It's the overall usage of the weapons to the point that if you DON'T have one, you're gonna get mowed down by the guys that did. You can have all the skill with all the other weapons you want, but when that guy gets 1 lucky shot off from the wingman or the peacekeeper, it's basically over no matter how much you hit him.

Don't get me wrong, playing a little better as a team, working to your advantages, and picking and choosing when and where to engage is important. Of course it is, and yes using them to your advantage can win you a fight against someone with these weapons. It's not like I've never killed someone using a wingman or a peacekeeper before, it's not even that hard. The issue is that when you have one of these guns, you have a clear advantage in the fight, beyond skill, beyond equipment, and beyond teamwork.