I don’t expect Ukraine to really have a lot of faith in any negotiation in which they don’t hold an extremely strong hand.
They already have a strong hand because of international support, but international support could end if Ukraine tries to negotiate peace without demanding total surrender. It’s a Catch-22 that Ukraine has been forced into by the West, because they are not allowed to negotiate for peace. They are only allowed to “win”, and that isn’t going to happen either.
So the war will never end. Either it ends up like the Korean War or the War on Terror - endless war forever.