The mistake you're making with your questions - are in the false assumptions that you're basing them upon. Russia's economy is doing far better than that of Ukraine - or those of the US, UK and EU ( ie NATO) proxies for whom they're fighting.
The World Bank recently had to upgrade their economic forecasts for Russia - AGAIN. Meanwhile, the actual costs of living in Europe and N. America are going through the roof - no matter what the economic and bureaucratic slight of hand indicators are telling you. The can of refried beans that cost me $1, prior to the west provoking this needless war - now costs $2.19 so that's 120% price inflation. By selectively choosing which prices to monitor - the Brandon Regime has a much lower, but fraudulent, number to quote.
The reconstruction of Ukraine will amount to an economic boom - a jobs program for the Russians (in NovoRossiya), and for whatever is left of the Ukrainian workforce, after they've been defeated. Meanwhile, in the west - we'll continue to see the upwards transfer of wealth to the elites, and the acceleration of replacement of human labor with AI and Robots, consistent with the 4th Industrial Revolution/Great Reset model of the WEF Trillionaires.
The other mistake you're making is focusing on land and large population centers, as your measure of Russian success. That's not the metrics they're going by. Their motives and rationales for their SMO entry into the Ukrainian Civil War were 4 fold. Firstly, they wanted to protect the Russians in the East and South, from the Nazi Genocide and oppression against them - after the failure of Ukraine to honor their Minsk Accords commitments. From there it was Demilitarization, DeNazification and Neutralization, relative to NATO. After capturing Mariupol and Kherson, the only areas they really want are Odessa and Kharkiv. Better for them and for those cities, that they take them, and retake Kherson, after the Ukrainian military is is in a complete rout. Urban combat is messy and costly, in terms of both lives and reconstruction. The Russians are happy yo cede territory where needed, to DeMilitarize and DeNazify the NATO Proxy forces. They're winning a war of attrition. They deplete the western armories and troop formations, while theirs keep growing - far beyond their losses. The Russian people are supportive of this effort, and will pay the costs whatever they are. They lost 20 million to defeat the Nazis, the last time. The strategy is far more economical, now.