The US & the West has lied to Russia so often that Russia would be foolish to leave any portion of Ukraine unconquered.
Sure, feel free to point out which treaties the US & the West has broken with Russia.
The Russian problem is that it is quickly withering on the vine and lacks the wherewithal to conquer a few city blocks in Bakhmut
Vladimer Putin is now a war criminal who has committed crimes against humanity. He is unable to leave Russia because he will be arrested.