@gollum,
I disagree. As I see it, there were three options.
1) Do nothing. Ukraine fights valiantly, Russia occupies and enslaves the country, a budding democracy falls and China starts putting the final touches on its plan to take Taiwan by force since the West is clearly not willing to take action. The smaller democracies in Eastern Europe formerly under Russian control realize that the US and Western Europe don't have their backs and they are on their own. They pull away from the West and start to suck up to Russia becoming versions of Bulgaria. (Remember this war came about because Ukraine went from sucking up to Russia to moving towards the West.)
2) Do everything. Go all in attacking Russian troops, send in ground forces, etc. Russia loses badly. (Ukraine stymied an overwhelming Russian attack using left over cold war weapons and homemade drone weapons. Modern weapons would have been much more telling.) Russia results to tactical nuclear weapons to level the battlefield. No telling what happens, but China almost certainly comes in on the Russian side, maybe India as well.
3) Provide significant support to Ukraine. Ukraine battles Russia to a standstill, even gains back some ground. Russia loses badly on the international stage. China pays lip service to Russia but secretly loves how weak Russia looks and how it has to crawl to them for support. (China makes it clear that use of nuclear weapons without direct western intervention will not be tolerated.) The Russian military is tied down so no more adventures like Chechnya and Georgia and the shenanigans of Russian mercenaries in Africa slows to a crawl. European countries that were entwining their economies with Russia pull away from them. Ukraine embarrasses Russia over and over, blowing up key bridges, sinking ships, killing generals on the battlefield. US intelligence gets a treasure-trove of data about how Russian weapons perform and how NATO weapons perform against them The protracted war creates domestic strife in Russia. Key N. European countries like Sweeden and Finland decide to join NATO, something Russia has be against for decades.
Given these options, I think the one we chose was clearly the optimum. Do you have a different take on what the options were?