If the past is any guide, Germany wrote off the Soviet Union the very same way and started Operation Barbaros. Soviets faced annihilation and then geared their economy for war. What happens after a long time was a complete reversal with Soviets in Germany and emerging as a super power. This did not come cheap and Soviets lost almost 15% of their population yet still managed to persevere. Prior to WW2, Soviet economy and military was not strong enough to even present itself as a great power. What this tell us that, in peace the Russians progress slowly. In war, they can truly outshine and use war as a basis to become a true power.
Waging economic and financial war on Russia is going to make a lot of people think....very hard. You are going to see the displacement of the US dollar as the reserve currency in due time. That in itself will be severe blow to the US and once of its own making. China is going to rapidly work on alternate schemes and intoduces new laws making it very difficult for many westerna companies to sanction China.
I dare the US sanction China over it potentially supplying Russia war material. Then everything will truly go to shits with the West feeling it the most.
So, all this propaganda is just useless when there is very little foresight of the future and poor understanding of history. It simply going to delude some people who are only going to get killed as cannon fodder which we recently experienced.