Reminder a country does not have criminal leaders without some support by the general population. While certainly the leaders are most guilty in these actions, the general population overall is not completely without fault. Economic hardship is not out of the question when you put a poor leader like Putin in power.
Prior to the war and Russia attacking Ukraine, Russia was at zero risk from Ukraine. Ukraine wasn't stealing their land, was not damaging their economy and had pretty much zero effect on anyone's lives in Russia. Nor did Ukraine pose any future threat not were they making or sending terrorists abroad.
Agreed on the first paragraph, this is why there should be a Marxist-Leninist Vanguard party in charge.
Capitalists cannot solve or improve the materialist conditions of people nowadays, they steal, plunder, lie, murder, bomb etc. Only a worker's party can truly improve a nation's wellbeing without resorting to awful exploitation. The capitalists always pander's propaganda to the general populace in order to divide people's into lines of hatred, the populace of Russia, and the collective west are told to hate each other, any deviances or questioning this hatred would be questioned and punished, similar to how wartime ww1 and ww2 created ethnic hatred amongst workers belonging to imperialist countries.
I suggest reading Das Kapital as introduction on how the capitalists continuously abuse the populace. Or maybe read a quick summary if you don't have the time.