Tactically, anybody saying saying either Russia or Ukraine is 'winning' this thing is probably full of B.S. it has all the makings right now of a stale-mate.
Strategically, Russia is having to expend an enormous amount of its GDP in this 'Special Military Operation' not even considering the body bags.
https://www.reuters.com/world/europe/russia-doubles-2023-defence-spending-plan-war-costs-soar-document-2023-08-04/Wars the longer they go on are eventually 'won' by economies. It is pure math. Is why U.S. prevailed in WW2 and why the Soviet Union eventually collapsed in late 80's when trying to keep up the military spending against us finally broke them.
Three states in the U.S., California, Texas, and New York have a GDP greater than Russia. If this Ukraine conflict were to go on for several more years, it is an eventual certainty that Russia economically would finally break vs the U.S. and NATO funding.
Russia/Putin is counting on being able to suffer longer than the Western countries patience. They are counting on wearing us down politically before they finally crack. Putin main advantages are his people are good at suffering and he's not elected and he totally controls the state media.
Russia is not 'getting stronger' over time the longer this goes on. If someone heard that…it is B.S.