Ukraine is the biggest country on European continent. It has the most capable military in Europe right now. And it's backed by Europe economically. Saying that Russia can't defeat them is not the insult you think it is. If Russia mobilized 1M people and went full on war in a month, they'd easily take over the Baltics, took half of Poland and bombed the F out of Germany and France. They'd lose eventually if Europe woke up from its delusions, but they definitely can take over most of Eastern Europe.