You obviously have not been paying attention to the war in Ukraine the last year or so. Russia is having a bad time out there, there is no way to dress up Russia's awful performance on the battlefield over the last 18 months. The conflict has been at a stalemate for the last 3 years or so with neither country able to make decisive gains on the battlefield.
Russia has been financing the war using a sovereign wealth fund that amounted to around 300 billion dollars before the war and a similar amount of debt in preferential loans to the MIC. This wealth fund is now dry and the debt burden at high interest rates are seeing increasing rates of default. Russia's only real source of income is from selling oil and gas which has gotten a lot harder with all of the sanctions and secondary sanctions leveled against the country. Ukraine has been damaging the large oil refineries at increasing frequency harming Russia's ability to produce the oil it desperately needs to sell.
This war has been incredibly expensive for Russia, if we add up the 300 billion sovereign wealth fund, the 300billion in bank debt to the 300 billion confiscated by the west to the budgetary spending we are at well over a trillion dollars. Using Mediazonas conservative estimate of confirmed Russian deaths on the front line we are now at 282,993 dead Russian soldiers, of which 7,920 are officers, this has been a massive waste of time and money to take control over slightly more of Ukraine than Russia already had control of at the beginning of 2022.
In short, winners dictate the terms of victory and it would be laughable to suggest that what Russia is currently doing in Ukraine resembles anything close to winning. Russia should take what it can get as soon as possible because as Russia's economy continues its slide down the toilet there is no guarantee that the terms offered in a years time or two will be anywhere near as good as they are being offered at present. I have been following the war since the very beginning and have seen Russia's ability on the battlefield decline sharply over the last few years. They currently have no conceivable path to victory, I don't even know what victory at this stage would look like for them.