If the US continues to aid Ukraine, then it's likely that Ukraine will be able to beat Russia eventually, due to the West's superior military equipment and tactics.
If the US stops aiding Ukraine, it will be much more difficult for Ukraine to beat Russia. If Russia achieves its goals and gains control of Ukraine, then yes, other NATO countries will be in danger.
Some of the "russia is loosing hard" news is propaganda of course, to raise the morale of people fighting for their homeland. I find it hard to get too mad about that.
Also, it can be more about the emotions of the humans doing the attributing than about the real governments. Just look at all the bizarre, contradictory, and fridge-test-flunking attributes which humans have attributed to gods and related mythical beings.
If a modern government wants an $unpopular_group exterminated, they can probably do so with brutal efficiency, given the tools at their disposal and the overall balance of power between the state and individuals.
If a modern government wants to win a war, well, half of those governments lose, because the other side is usually way more powerful than a random $unpopular_group.
If a modern government wants to achieve some nebulous goal such as "defeat disinformation" or "root out racism", I would bet on a spectacular bumbling failure with a lot of graft every time.