The war then doesn’t end. You think Putin will be satisfied with just a bite of uk? He has repeatedly said, and the pro Putin folks here repeat that they consider ukan “illegitimate country “
If you go back and read news items about how Ukraine was pushing for NATO membership and stock up on weapons of war you can understand why Russia was not going to tolerate that.
I think Russians are not stupid. They know they can not occupy and control all of Ukraine. The main objective of war was an attempt to build a land buffer zone between Russia and NATO member Ukraine.
I am not a historian but I have read news articles claiming in some parts of Ukraine the majority speak Russian. That was probably the main objective by Russia, to get those areas join Russia, same as Crimea.
So in summary I do believe the war would end quickly id Biden stops sending borrowed tens of Billions to Ukraine.