The fact that they didn't, leads to two possible conclusions. Either Putin was not fully committed to waging war on Ukraine, or Russia is incapable of waging a war on the scale that we were able to on the two invasions the U.S. executed on Iraq.
It still doesn't change the fact Russia has, by vast numbers, more resources than does Ukraine to protect itself. Russia has the tactical advantage of proximity to wage war than does any of Ukraine's allies, except Poland. Poland lacks the resources that Russia has. The rest of Ukraine's allies have long-distances to send military equipment to Ukraine's battlefield. That has dire impacts upon Ukraine's ability to effectively protect itself, as well as, create and deliver and effective counter-offensive.
When will you Zelenskyy/Ukraine cheerleaders acknowledge these salient facts which made our support of Ukraine military response, was ill-conceived as well? My guess is never. Because you people will never admit that you were wrong. You all also lack critical thinking skills, and react totally upon an emotional level. That too is something none of you will acknowledge.
Due to corruption, a lot of it is because of their Soviet legacy