>>Western interests are not necessarily in line with Ukraine’s

I have to agree here. Western interests are to degrade Russia's military capabilities to the point that it can no longer launch invasions on neighboring countries. Ukraine is more focused on throwing them the hell out.

I'd add that a collapse of the RF would indeed degrade Russian capabilities, but multiple (probably warring) nuclear powers right on Europe's doorstep is... problematic.

Look at Russian demographics. They've lost multiple hundreds of thousands of military age men to both war and out-migration (primarily the latter). Can they mobilize enough more? Russia has a "National Guard Forces Command" that supposedly can be mobilized by the president. I've no idea how many troops that might be. but perhaps you do? And probably neither of us knows what might happen if they were all redeployed to Ukraine.

>>…Ukraine is still not likely to be “liberated” fully, or free from Russian aggression should it “win.”

So… Western interests (degrade RF’s capabilities to invade) and Ukraine’s (keep them out) actually are aligned.