Yeah, yeah, yeah... but here's the thing: more or less all the militaries suffered from this, but it was really only the Russian army that suffered the sort of major, intense partial collapse that we see in 1915, leading to them basically abandoning everything they had won or managed to hold on to in 1914 and retreating the heck out of Poland and part of the Baltics. In contrast, we all know what the CPs were doing, and by this point in time the Western Allies were actually launching attacks with a relatively even Kill-Loss ratio (outside of the Alpine campaign, more or less).
So clearly there is something wrong here with the Russian military that can't be just written off as a simple lack of equipment even if that did play a major role. Rather, we should probably be asking why there was such a chronic mishandling of the equipment stocks and especially troop positioning to compensate for this. Yet because nobody fixes things or does whatever they need to, we basically see *both* North and South wings of the Russian army collapse from the Central offensives, leading to the entire Polish salient caving in on itself and the entire Russian army being forced to pack up stakes and flee to avoid getting encircled.
And that's before we get in to singularly bad showings like the 2nd Masurian Lakes, and the singularly bad failure to consolidate what had already cost so much to take in Galicia during the last year, which led to the loss of all of it. These sorts of fiascoes weren't limited to the Russians, but they were especially bad in their case.