One thing I rarely see discussed is how this is a strategic win for the US. It pretty much permanantly destroyed the concept of a unified Europe with Russia and Western Europe now being in a perpetual position of animosity (the US failed to consider that Russia can always sell to Asia and other countries).

The US knows China can't be beaten, so it ensured Europe doesn't unify and create a singular economic bloc that would further threaten US interests across the Atlantic. Asia is lost, Europe will be lost sooner or later. The best way out for US was to make sure Europe stays weak forever.

Ukraine left alone will be known as lawless hub of terrorism and weapons

That's probably the point, this kind of places seem to be left in wake of US interventions very often.

Ukraine left alone will be known as lawless hub of terrorism and weapons

People have joked about a "stabbed in the back" narrative, and that is looking more likely every day. With all those weapons sent to Ukraine, having well armed militias on your doorstep who believe you betrayed them, could potentially lead to some crazy blowback in Europe.