Realistically, if you were to imagine what the negotiating table looks like at this point, Ukraine is aiming for restoration of its pre-2014 borders--that is recovery of Luhansk and Donetsk, not to mention Crimea. Those terms are almost certainly nonstarters to Russia, but Russia hasn't inflicted sufficient damage on Ukraine to cause them to ask for anything less. For its part, Russia seems determined still to ask for annexation of large parts of Ukraine--they are currently attempting to put together a referendum showing that occupied Kherson wants to be part of Russia (and it seems the current offensive is interfering with their planned timetable--embarrassingly, they might not hold Kherson when the "referendum" is currently planned).

So the only way that Russia is likely to capitulate is if the military situation is so hopeless that it has to admit defeat in the conflict. The military situation has yet to reach that point, though. Instead, we seem to be set for a years-long grinding stalemate as the most likely outcome.