@Alphabets DPS is not the only factor to show which weapon is OP. Lets see the old PK, which has only 88 DPS and we think it is broken while the joke mozabique has a higher DPS than PK (~95.25), yet we said this is a joke weapon.
One headshot of wingman can change the output of the fight directly, especially all other close-ranged weapons lost their headshot damage at a distance. One less shot is required to down a player if a headshot landed in almost all situations when using wingman, and this is the advantage of wingman which does not loss its headshot damage in all distances.
The battle pass skin may be a reason for the increasing number of player using wingman, but this problem (no damage falloff) always exists since the wingman is introduced, and I am not the first person who pointed out wingman should add a damage falloff like other guns.
If I need to improve my playstyle, I would act like the guy on top :"I stop fighting because I KNOW I will lose. I leave. It doesn't matter who it is". It is ridiculous for a pistol to win an AR while in a mid-range since this pistol can deal ~75 damage headshot (with helmet) to me even at that long range.