Cronos is right. The attack on Kiev was not a feint. The Russians made it clear their intention was to take the city and install a new president.
Two things got in their way: 1) Russian forces were simply poorly prepared and lead, 2) the Ukrainians fought harder than the Russians expected.
Russian state media (RIA Novosti) even had an article ready to be printed praising the taking of the city - which never happened.
https://www.polygraph.info/a/fact-check-russia-ukraine-kyiv-attack/31803601.html
30,000 troops.