The West has failed at what, though? All wars are tragedies, but nobody promised they were going to protect Ukraine in the first place, and it’s a long standing international precedent that two countries can go to war without everyone on the planet sending troops.
Ukraine got a raw deal, there's no doubt about that, but they didn't and don't think that it was ever a mutual defense pact. A lot of us have skewed perceptions, because a lot of us live in countries that have never in our lifetimes been invaded, but the general expectation on the international stage is that countries can fight wars without friendly third parties sending in their own troops.
