Russia Ukraine war, page-166288

Please provide a link to any official source where members of the Russian government stated, that the Ukrainian war was meant to last for 3 days.

As for your childish question regarding "why does Russia not attack it's real enemies" it seems that you equated global geopolitics to a video game, something like Age of Empires, where the ultimate objective is to destroy your enemy. The world, with it's globalised economy is just a tiny bit more complicated than that.