A few of us are guilty of that. It always appeared that Putin is an intelligent, if not always very amicable fellow. Ruthless, yes, but not crazy. Apparently though, that's at least partially not correct. Worse though, he made a couple of funny posts not age very well, and that's pretty unforgivable. Meh.
@BruceVC for a more serious reply now that I have some time for it, yes, apparently the intelligence wasn't a fabrication, or exaggerated for effect. You know the story about the boy who cries wolf, he gets eaten by the wolf eventually, but indeed, it was correct this time, the posts didn't age very well, and I was wrong in expecting that this crisis would be solved without shots being fired - kind of like every other crisis every year ever since 2014. To be honest, I still don't see what Putin expects to get out of this that benefits Russia, or his position, in the long term. You'd think France and Germany would put their own interests above others and strong-arm the Ukraine into backing down, but hey, here I was... apparently overestimating Putin, Macron and Scholz.
Putin always did a good job in keeping the EU divided and navel-gazing by supporting the fringe elements of many EU states that wanted the EU to go back to being a trade union (Front Nationale, The Freedom Party, fellow dictator wannabe Orban, recently supporting the anti-vaxxer movements) in order to prevent a more tightly knit European Union and common defense policy, but now he's running dangerously close to undoing a lot of that work*.
I also really don't want to be in Zelensky's shoes right now. Like @Guard Dog said it is really unlikely that anyone is going to war over the Ukraine. Going to be a lot of hindsight is 20/20 for the Ukranian government. A government I have a hard time expressing any sympathy for, to be honest. It's just really bad for the Ukranian people. They certainly donn't derserve any of this.
Two weeks ago, I'd have agreed to your assessment, and made it myself. Now, I'm not so sure. Apparently this is a hill worth dying on for Putin, for some reason.
*Admittedly though, probably not, because the US also has no interest in allowing any of that, and if this invasion proves one thing then it's that if push comes to shove, any emancipation of European interests flies out of the window in an instant.