It has nothing to do with that. Their basic strategy has failed. Their tactics and logistics are lacking. Nothing to do with the weapons themselves, even if those weapons are 40-50 years old. I mean, after the end of the Cold War, they have only built around 700 T-90s, all their T-64s, T-80s and T-72s are from the 70s and 80s.
Instead of taking cities violently, they are just sitting around them hoping the Ukrainians will surrender. If that was their plan, they should have taken the cities in West Ukraine instead of allowing the UAF take Russian-speakers hostage in East Ukraine. On top of that they don't have numbers, they should have invaded with 400k soldiers instead of 150k. On top of that, they are not using their air force and artillery. But of course, it's not a war, so it's not a surprise they are calling it a "special military operation".
They never anticipated the Ukrainians to use entire cities full of hostages as a winning tactic. It's no different from the Chinese taking Kathmandu and the IA sitting around it doing nothing because they can't kill Nepalis.
Whether the Russians have won or not now depends on how the negotiations go.
Russia's president revealed his peace conditions in a phone call - the BBC spoke to someone who listened in.
www.bbc.com
The Russians are slightly softer than before, when they wanted a puppet govt before the invasion began, but the demands are pretty much the same as before the war started.
Of course we do. Plenty of Chinese satellites to kill in orbit. We even need the ability to kill satellites in GTO.