Russia, all by itself, has fought America, Canada, all of Europe, and NATO to a standstill and is now winning.
If fighting against the 0 American troops currently stationed in Ukraine counts as "winning against America", then by that logic I have "won" against the temptation to drink the whiskey that isn't in my house.
How long do you think Americans would put up with high casualties fighting the Russians in Ukraine? Do you think Americans want 100,000 KIA on the Eurasian Steppe fighting a Slavic civil war? It might start a second civil war here.