just yesterday Putin warns other countries to stay away from this war. he is not bluffing with this. America can stop the war, there is just a price for it. Ukraine can stop the war too and well, for a price too.
Personally, if you are Ukraine. Would you allow peace at the price of Crimea, Donetsk, Luhansk and the Mariupol area that connects Crimea to Donetsk?
Poland may try. there was news yesterday that they are going to reunite with what's left of Ukraine which could be a solution and west Ukraine can be Putin's profit for his war. this could be an alternative bargain or it could get worse when Putin takes Poland as well.
I do not see this happening. And do you really believe that Russia can occupy western Ukraine too? I even think Russia is not controlling western Ukraine's air zones anymore. There's a reason why Russian army withdrew its siege on Kyiv and focused its attention on the eastern side near Mariupol. Only Ukraine and Putin can stop this war. The west cannot just bargain anything without Ukraine's approval. And I doubt NATO countries are scared of Russia. Stoltenberg even boldy suggested a quick NATO membership on both Finland and Sweden.
guaranteed there is so much support for Ukraine, none of them got there the ground zero because if they do show there, Putin will send his weapons of mass destruction to shoot a single outsider's vehicle. it will sound overkill but they can justify this because he had sent warnings already live on TV. while they are not yet doing that, NATO countries will have to be careful not to provoke them from doing it.
i'm not sure if he can get west but he did get the eastern part of Ukraine.