Wrong. Russia's army's real fighting forces were the so-called elite troops/mercenaries that got decimated so bad that in order to avoid Ukraine recapturing
all territory it lost post February 2022, Putin had to mobilize reserves last September which cost him popular support but merely function as a surrogate to his well-trained forces. The numerical superiority matters little: the West and the Soviet bloc military aid bought with Persian Gulf statelets finances helped Iraq survive years of struggle against Iran which had a much bigger population and was on offensive before finally giving up in 1988.
Russian professional army was also way below US standards; its reserves essentially function as cannon fodder. That's what Russian "military doctrine" has been and is vis-a-vis training conscripts:
https://en.wikipedia.org/wiki/Dedovshchina
If the West keeps propping up Ukraine and their civilians don't get utterly exhausted, they can go on for a year or so and have Russia expelled from most of the territories it has seized.