Puhllease, the Russian army is just as corrupt and incompetent as it has always been.
They are good at hand building a few decent pieces of equipment for select units: the rest is junk. To say nothing of their extensive infantry training building dachas for the officer corps.
This article from Polish newspaper claims Russia has already suffered 2,000 KIA fighting in Ukraine. link
Sounds high to me, but probably not by much.
And that was fighting the Ukrainian army and irregulars.
While I'm inclined to believe that too, I don't know of any evidence that's a fact.
There is some MINOR evidence that Russia is fielding a better trained and better equipped force today. Though those numbers appear small, they are backed by large numbers of old-school Russian Army.
They could still lay a road with artillery across much of Europe. Lots of self-propelled tubes in inventory. Lots. 2500 is a minimum count with thousands in reserve.
Tanks: 2600 active with 12,000 in reserve/storage.
The implication being, of course, that these assets can be protected via air power.
Without US Air power, I doubt Europe could seriously challenge the Russians.