The Russian military fights like what you would expect from a third world country. The Soviets appeared to be a paper tiger the whole time during the Cold War. Lend Lease Program helped them tremendously during the WW2, the United States provided the Soviet Union with more than 400,000 jeeps and trucks, 14,000 aircraft, 8,000 tractors and construction vehicles, and 13,000 battle tanks.
We're seeing Russian equipment break down in Ukraine, the Russians are so corrupt that they spent little money on their budget modernizing their Soviet era hardware so they went in with aging gear.