I do play Axis when I feel like winning games.
Anyway, I don't really think whatever small bonus Allied MGs have in damage vs vehicles or other units is that relevant because its not the job of a machine gun to fight vehicles or necessarily kill infantry and besides the vetted MG42 with AP rounds is even better in that area anyway lol! I mean the Vickers can't even cover a capture point and keep a signle enemy sqaud from taking it from you. The Browning is okay but costs more than its superior Wehrmacht counter part for no apparent reason and its more on pop. With the preformance and stats the way they are then a Browning being 280 MP and 7 Pop means an MG42 should be 300 MP and 8 pop and a Vickers should be almost free (half joking). The MG34 for OKW isn't nearly as good as the MG42 for Wehrmacht but it still seems as good or better than the Browning or Vickers. The fact that the Browning is locked behind USF tech is pretty relevent because usually you have to pick between AT guns or MGs since its rarely viable to get both in most games (yes yes I know you can do the Airborne thing and avoid that but you shouldn't have to depend on a doctrine to survive). This of course is something neither Axis nor Brits or Soviets have to worry about
Allied nations do require a higher level of skill to play on par with the Axis factions. Ost is generally defensive and it's easy for anyone to set up a defence compared to how hard to is to orchestrate a full on attack.
I think I've seen you in games too.
tbh I think it's L2P for you.
Allied play styles are much different to Axis, I main USF and I feel i do very well, but I lose heavily when I play ost because I keep trying to flank and smoke things. Most Ost units favour sitting at long range and battering the enemy from there. I know from playing USF how much an allied players mouth will water if you come up close with a panther (although I still cant break the habit of flanking/charging with them)
Basially Axis powers generally require less micro to pull off, so when you say other Axis units consistently outperform allied units, they will, if you play allies with no more micro than you do with Axis.
Although, Mg42 insta suppress should be nerfed to the second burst, or the time taken for suppression to wear off should be reduced. Alot of times my riflemen clip an MG42 (with one model), one burst suppresses them and it takes so long to wear off they loose a close range fight with some grens even though the MG did basically nothing.