Russia has been playing softball with Ukraine. They may have to change tactics to end this.
The problem is that, even if the war ended today, Russia would not be able to rebuild the infrastructure that they have destroyed, in particular, Ukraine’s energy production sector. The war has taken Ukraine from a functioning kleptocracy to a non-functioning, international welfare sponge. Ukraine had little before the war. Now it has less than nothing. That is what the Russians will inherit when the war is declared over.