Russia has 21% interest rates, 8.5% inflation. The ruble has lost about 17% against the dollar. India and China will only trade with it in their currencies.
On paper, Russia's GDP looks great. Wartime economies do that, but also starve the consumer sector.
The flight of Western capital and technology means Russia only has its home-grown scientists and engineers to keep the oil fields running. They are all retiring, without replacement, as the Russian education system collapsed in the mid-80's.
After seeing how easily Russian armaments are getting obliterated in Ukraine, purchasers of their military equipment presumably have significant buyer's remorse.
Russia also has a demographic crisis. The population is collapsing, and the meat grinder in Ukraine is not helping. Neither is the drain of able-bodied men leaving, to avoid being drafted.
It's pretty obvious the sanctions and market losses are hurting Russia, irrespective of what bluster comes out of the Kremlin that it is not.