Nobody in Russia ever claimed it would be a 3 day sweep. This is a narrative that was made up entirely in the west. That said though, we now know for a fact that the war could've been over in the first two months if the west didn't sabotage Istanbul talks.

Also, last I checked Russian industry and economy is thriving right now. A lot of that is a result of western sanctions ironically which created domestic niches for businesses to fill, and stopped capital flow out of Russia. World bank just moved Russia up into a high income country as a result https://blogs.worldbank.org/en/opendata/world-bank-country-classifications-by-income-level-for-2024-2025

Also, incredible that people believe that Russian manpower has been decimated when even US military officials openly admit that Russian army is now stronger https://www.voanews.com/a/us-air-force-general-russia-military-larger-better-than-before-ukraine-invasion/7788601.html

The place where industry and the economy have been decimated is Europe.