If you don’t understand what Russia winning militarily has to do with anything there’s really no point continuing the discussion.
Putin could end the war tomorrow. He chooses not to. Maybe he chooses not to, because he thinks he is winning? It does not matter. What matters is that he chooses not to end it, killing millions.
The west continues to use Ukraine as a proxy to try and weaken Russia, killing millions. The west could stop doing this any time, yet chooses not to.