I personally don't know what to think. I think the US framing of the situation is childish: "the Ukrainians wanted to leave and Russia doesn't want them to". As if they wouldn't do exactly the same thing, where they in that situation. Seems to me that you cannot ignore the geopolitics. At the same time, a people have sovereignty over their land and a right to do with it what they please, but that is only an ideal and not true in practice. Well, there is nobody enforcing such ideals so you need to go to war...
Even way back before Ukraine, people question why Russia has been kept as an enemy after the fall of the Soviet Union. Because they don't submit to the US hegemony? But they could be allies. India doesn't submit either, for that matter, but they are semi-allies. But not Russia. Because? We wouldn't be in the current situation if Russia wasn't antagonized so hard way back then.
I think it is very hard to parse objectively what is happening because there is so much propaganda and heated opinions on the topic. And not everyone has the same objectives, and people can always contort themselves to blame everything on those they despise.