Europe and the US have used almost all possible sanctions to put pressure on Russia. If it is not true to say that Russia is not affected, this will more or less affect the Russian economy is inevitable. But to say sanctions will kill or destroy the Russian economy so far, the plan of the US and its allies has completely failed. In the long term, I have a more optimistic view of the Russian economy because it will have time to find new partners and allies and fix things faster than it can. Europe is not the only customer in the world, so Europe's absence will be resolved, but things take time.
Russia is a great power, has rich natural resources, and is the world's second largest supplier of oil and gas, a comparison with Cuba is a lame comparison. The US can only bully small countries but cannot crush powerful countries like Russia and China.
More than a year has passed, and we can see that Russia is still standing up to the sanctions and that their energy industry is bringing in huge revenue. With that, they have turned to Asia, looking for new partners, I really doubt that their economy will collapse or will fall into a deadlock like Cuba. If the US and its allies want to destroy the Russian economy completely, they should have a new, more effective solution.