There is an thousands year old Jewish proverb that goes something like: "If everyone tells you that you're drunk, best not to argue, just get to sleep."
Allied players are in decline. Full stop. Those who want to play allies are saying it. Those who play both say they now choose allies only because the wait times are less. And others just don't say anything because they have left and moved on to other games. So there is a problem. To argue with the perceptions of those who don't play or have left misses the point. Perceptions are reality to each individual.
You can say that the perception is tantamount mis-perceiving the problem, but objective statistics and all the anecdotes say that the problem exists. You can shout "it is just an L2P issue" as loud as you want, but the more successful you are in getting the game designers to look away from the complaints, the longer your wait times will get when you play Axis.
+100000000000000
okw > ostheer > soviets > usf