A local once said, "Economically, nothing has changed". He still goes to work and shopping like before the war. Well, maybe the prices of some items have gone up a little, but not so much that it's obvious.
I will not totally agree that the war did not affect Russians negatively. But I will believe that this invasion have both affected the economy of Russia positively and negatively. Russians are now buying locally made products which is a good thing to the Russian economy. Local industries now have less competition from foreign product which will make them make profit and increase employment opportunities. Russians have been forced to negotiate trade using the Russian Ruble which help to reduce their overreliance on the US dollars. The negative implication is that there are lesser foreign direct investment, limited product substitute, unemployment and reduced transfer of technology.
But I will also accept that the US and NATO underestimated the Russian economy. They thought their multiple sanctions will cripple the invader's economy, but they were surprise that their predictions failed. It is clear that Russia have prepared for this war and the resultant sanctions. The economy seems to be sanction proof.