With respect to Putin's goals, perhaps you missed the primary axis of the initial Russian assault on Ukraine was the attempt to seize Kyiv. I do not believe any serious commentator on the war believes Russia's initial goal was anything put the total subjugation of the country. I frankly see zero evidence that has changed. Certainly, Russia likely would eagerly now accept an extended truce in place. but I do not believe any serious observer thinks Putin's ambitions end there.
Finally, in spite of all its arguments, historic baggage, and British truculence, the European Union experiment has been remarkably successful on the Continent. Is it any wonder, occasional old guard politicians not withstanding, large majorities of Eastern Europe strongly support a Western rather than Eastern future. Certainly Ukraine pledges that every single day in the most basic way possible.
Attempted seize of Kyiv, could be explained by attempt to remove present Ukraine regime and military leadership. I could explain it as military goal, not political or terirorial (who knows what would happen later?) But indeed the attempt was made and was not successful. And removing regime in Kyiv, is not unrecognized goal of Moscow.
I dont think western culture is resented in Eastern Europe, as well. But (at least in pre war time) was not resented in Russia neither. It could be seen all over. Mac Donallds, theaters, movies, western companies, western car imports, and other products, all was very much present, and accepted by people, and by then-goverment.
My company had a project in Russia before the war, so I have seen it first hand.
What is eastern culture, btw?
We should define that as well.
Orthodox Christianity (as we have in Russia and Eastern European nations - excluding or including roman catholic Poles) - or is it far eastern culture based on Hinduism and Budism as historic dominant religions in those parts? which ones to we tend to prefer naturally?
Is it so much different, then other alliances made, for example with cultures of other countries and regions such sharia states in middle east, like for example Kingdom of Saudi Arabia?
In case Russia wins, there will be a new geopolitical world division, in which we dont yet have experience.
In case they win, they will probably establish themselves as a proven world player. This is the significance of this war.
There is other emerging power, also - China.
China and Russia may emerge out in the future as superpowers. Historically, I cannot remember multipolar world where geostrategic interests will be divided in three zones of interest, as it probably will in this case. So, there will be challenges in politics in the future if it happens.
Can there be three powers in the world opposing each other, or some new alliances will be made, two against one?
Somehow, I see Russia as more natural ally to the west, rather then China.
Russia covers 10% of global land mass, country on two continents and has access to anything between 10 and 30% of natural resources, oars, gas, oil, etc. Plus developped science,, technology and industry. And very importantly, if global warming continues and ice melts, they will have control of shortest commercial sea routes to the east, by polar northern sea passage. (New "suez canal") We know that 90% of all global trade is done by commercial deep sea shipping.
In the long term, I think is better to have them as allies. It will benefit both Europe and USA.