History sure does rhyme. They did the same thing in 1940, expecting to hold a parade in Finland with their front line troops:
It was set aside but was later rediscovered and was first performed in 2001 by a Finnish orchestra.
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"The sources said that the initial US assessment from before the invasion – which anticipated that the Ukrainian capital would be overrun within one to four days of a Russian attack – remains the current expectation." [1]
"Milley (Chairman of the Joint Chiefs of Staff) told lawmakers during closed-door briefings on Feb. 2 and 3 that a full-scale Russian invasion of Ukraine could result in the fall of Kyiv within 72-hours, and could come at a cost of 15,000 Ukrainian troop deaths and 4,000 Russian troop deaths." [2]
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It seems that the narrative largely swapped to this all being Putin's plan once it didn't work as out like our military/intelligence agencies expected.
[1] - https://edition.cnn.com/2022/02/25/politics/kyiv-russia-ukra...
[2] - https://www.foxnews.com/us/gen-milley-says-kyiv-could-fall-w...
And here is Sharij, a pro Russian journalist from Ukraine that's extremely popular, mocking all the reports of destruction of Russian forces on the first day and believing all the Russian lies, such as having destroyed all the anti aircraft systems of Ukraine: https://m.youtube.com/watch?v=7gO6vuI2-BQ
You must also understand that in Russian culture it was common to mock Ukrainians as dumb farmer hicks, while thinking of themselves as highly technologically advanced.
Where did you get this info from? My experience growing up in USSR (in areas that are now Russia and Ukraine) was totally different. Ukraine had a reputation (well deserved) as a major tech hub. Most of Soviet space industry (military for one) was there -- rockets, missiles, rocket engines, electronics. Kyiv University was one of the major places of learning rivaling MGU (Moscow State University). People from all over the Soviet Union were fighting nail and tooth to be allowed to move and live in Kyiv. Yes, there were folk-jokes (anekdoty) about Ukrainians like about anybody else. This does not reflect in any form upon the fact that Ukraine was very highly developed republic within USSR. 3 out of 7 leader of USSR were Ukrainians (Khrushchev - 8 years, Brezhnev - 18 years in power, Chernenko - 2 years). Ukraine has always been a force to recon with.
EDIT: typos.
I am, however, only talking about the Russian assumption of the ease of victory, where reality ended up being very different (7,000-9,000 Russian soldiers dead in a week in that one battle), and the evidence of it in the form of the musical instruments etc for the parade.