The longer Ukraine does not surrender unconditionally, the smaller it will end up, simple as that. Four new territories are now part of Russia, added to the Constitution. This CANNOT be reversed.
It is actually so crazy to watch how many people believe that Ukraine which is several times smaller than Russia can somehow win. In their wet dreams only. Russia has the resources to fight indefinitely long. Russia is starting serious action only now having given up all hope for negotiations. Which means only one thing, Ukraine will keep shrinking.