every faction has brain dead tactics like blobbing and Mg spam etc, its not something thats unique to axis. I dont agree with your statement saying axis squads are more forgiving because axis usually have smaller squad sizes, making them more venerable to being wiped.
You need to define what you mean by 1 powerful unit and weaker allied units? what units exactly.
In team games this a is a trend ive noticed, in low level games axis teams win more but in higher level games where you tend to have organised teams, allies are winning more.
The whole weakness to being wiped really only applies to explosives. Grens are a Long range focused squad that gets an LMG upgrade that makes it hard as hell to dislodge without taking loses. Yes they might have a smaller squad but since should be fighting at max range they shouldn't be getting wiped on chase. Therefore infantry VET is easier to preserve compared to Rifleman that are more expensive upfront and cost quite a bit to have them fully upgraded with grenades and bars/zooks.
As for VG, they are designed to be supplanted by Obers which are probably the best AI unit in the game. They are literally Grens on steroids while able to fire on the move. Due to their insane RA the only thing they are truly weak to are explosives. SMG squads can beat them up close but using 2 equally skilled players, the Ober player will cause model drops on assaulting squad or retreat instantly to not risk losing unit.
Also some of the tools are better on Axis infantry compared to Allies due to squad size differences. This also helps reduce micro allowing for worse player to compete with a better player. For example most axis cloak allows some movement without losing cover. For brits to have that commando spawn with just 3 units, airborne Guards only cloak when stationary and have to fire first to even get damage bonus. USF doesn't even have an assaulting cloak unit, all of theirs are long range or AT focused for Recon PARAs.