Russia has incompaciated the second largest military (a true near-peer) in just a handful of months. Like it or not, their tactics have worked. Read up on military feints and Maskarovka, nobody is better than this than the Russians: https://en.m.wikipedia.org/wiki/Russian_military_deception

Russia has incapacitated the second largest military indeed: their own. Trying to invade a country which a couple of years ago didn't have any real army to speak of, and failing terribly. They lost Kyiv, they lost Kharkiv, hopefully after Russian economy crashes they will also loose their territorial integrity.