Not really, not everyone's whole geopolitical judgement revolves around current US presidency, certainly outside of terminally political westerners.I'm more and more convinced their primary miscalculation beyond all their military problem was how uniquely and utterly weak President Hairsniffer is personally and how charismatic Zelinsky is.
They thought after the US's disgraceful humiliation at the hands of the Taliban that they could just walk in since no one would stop em and... well... that's what happened for the first months where they botched half the invasion... they could and did just regroup to fight it out 'conventionally' where they were slowly but surely grinding the Ukrainians to dust with their massive artillery advantage pre HIMARS.
But they weren't the only ones to realize Hairsniffer is a cardboard cutout of his former plagiarist creep self, literally the entire fking world's leadership knows this including Zelinsky, who saw the US leaderless and started asking for everything he could get. And which he's gotten more and more since he knows how to act. And since we're in a real life 'Wag the Dog' scenario where it's just money and stuff for the US... and most of that money's going to our MIC... well... it's honestly kinda funny seeing how utterly pathetic France's and Germany's leadership also has been considering how unhappy they reveal they are constantly at their diplomacy being shackled to DC and therefore Kyiv.
Pretty much any other person being US President, even Willie Brown's Whore aka Kamala Harris would've gotten offended or tired or maybe even apprehensive at Putin's threats and actions on the world stage... but Biden's shaking hands with thin air and since no US soldiers under the banner of the US have died... well... without martyrs/'martyrs' a cause has little traction and those who are anti-war basically don't have any for this war. Yeah we're drawing down on our own stockpiles, sure, but we can make more and until the Chicoms go for the brass ring... that's not the best argument.
And on the flipside, if Ukraine didn't have Zelinsky as President I don't think any of their previous Presidents nor many of their other politicians would've been able to keep the Ukraine war as the 'current thing' in the world's consciousness for nearly as long as he has. The fact that he's Jewish with Putin broadcasting to the world that this Super Duper Special Military Operation was 'denazification' was just *chef's kiss*.
Russia was preparing for it more or less since a couple years earlier, and thinking about it since 2014.
Really, a big part of the grand misjudgement of the first days and weeks of war was Russian projection of own standards and customs onto its vassals. They really think Ukrainians more similar to them than they really are, except plus evul western influences. Yet it turned out that over 8 years of low level warfare they could in fact get their shit together quite nicely considering how meager their resources were economically, considering their starting point in 2014 being about as bad as expected - not only that, Russians with all their spying didn't realize this happened and its implications. They really though that they could get away with just driving into the capital with minimal opposition and install own government to make the West face a done deal and just make an argument that there is no point in getting outraged about spilled milk, no Ukrainian government to support, and no point in sanctions against an already finished war effort.
Some say Russia even expected outright terror and surrender from half of NATO, but even without that, it may have worked to the point of lack of severe consequences.
But beyond the 3 weeks, the whole plan was failed because it couldn't maintain the speed necessary to succeed by out-running western political and material response, seems like it's all improvisation afterwards, throwing more good money after bad, and then acting surprised that it's never enough, while the stockpile of good money is visibly thinning out.