Beside waving the criticism with a simple ''wrong'' maybe you should bring some arguments on why the MG42 isn't the best MG in the game and the others are bad, which they are.
It gets tiring to reply to the exact same threads every time someone new decides to bring it up. The MG42 is argueably the best MG in the game, correct. But stating that allied MGs are "useless" is wrong. The maxim is suboptimal to prevent maxim spam. Maxim spam is effective because of the lower setup time, and larger crew. The balance team didn't want to lower the crew count on the maxim because of the unfixable maxim deathloop. So unless you have a better idea on what to do with the maxim without overbuffing it bringing back maxim spam, we're all ears.
The 50 cal is more than fine. It has a fast setup time with good suppression.
The vickers was also just "tuned" not nerfed in the previous patch. They changed around its veterancy a bit to prevent it from having zero suppression at vet 0 and high damage, to giving some decent suppression early and taking away its later suppression at vet 2.
If you'd like to see near "useless" HMGs, please see the MG34.