Putin cannot win this, he bought into his own hubris and delusions, I think the west has been fattening him for a long time waiting for an opportunity. If Putin for example crashes Ukraine, total annihilation, what does he win? He becomes North Korea, total isolation to play with his toy nukes. Russians do not want this, they love the west for leisure and business, even the average Russian would rather be in the west than Russia. Putin will eventually have to cleverly coil his tail between his legs and find a way out, he has lost, the west finished him without direct confrontation.