I'm curious what would happen after the current war-time surge of jingoism cools down in Russia and people notice their material conditions do not improve
Improving material conditions at home was not the goal or aim of this war, and nobody expects it to. Everyone knew they would have to tighten their belts to make it through western sanctions, but that was the only way. The only alternative was to not go to war, and suffer even more in the future during 90s 2.0 balkanization boogaloo.
The west will be in a much worse spot than Russia. Russia will be recently victorious and one of the leaders of the new multipolar world, with its sanctions falling off as the desperate west tries to rebuild its own economy after de-dollarization.