how does that change the credibility of Europe except for showing that maybe help was not large enough

I think that's exactly it tbh. The amount of decent hardware delivered hasn't been even nearly enough and the ramp up of artillery production has been shamefully slow. Why is Ukraine being heavily outgunned with the collective might of the West behind it?

We should have given Ukraine everything they needed on day one. It's so painfully obvious that if they lose we're all going to war. All of us.

The appeasement attempted by not giving the really good kit and honestly fuck all air defence (the US has something like 1100 patriot systems) was utter folly.

"Oh, we'd better not escalate". FUCK. THAT. He tried hard to take Kyiv and kill Zelensky and only absolutely laughable logistics prevented it. That goal is still there.

Putin's "logic" for Ukraine being part of Russia already applies to the Baltics. If Ukraine falls, he'll bide his time, rebuild with their new war economy then trundle into all 3 of them via Kaliningrad, Northwest Russia and Belarus all while claiming that if anyone sets foot in Kaliningrad he'll press the red button causing untold pearl clutching in the West. Unless NATO has significantly built up their presence in the Baltics, they will fall and he'll lob in a load of defensive positions before you have time to take a piss then be off down south towards what he probably sees as "softer" targets in Moldova, Slovakia etc.