Hmm, a slippery fish, interesting.
Sure the actors aren't good/bad but are acting out of their interest.
But the whole "Imagine if Russia staged a coup in Mexico and installed their guy" sounds like you're saying the whole situation got started because some actors' interest was to expand their sphere of influence and squeeze Russia. Let's say that this is the case; sure, I would then agree, the only logical move for the actor Putin was to sooner or later confront this with a war.
I'm arguing, how do you know there was a Western-engineered coup? Got any links? To me it looks more like a population that didn't want to live under the corrupt Putin/Yanukovich regimes, an actual people's movement. Maybe there aren't any bad actors, but it sounds like you're absolving Putin from any blame, with the whole Mexico-line of thinking, you're saying (I'll assume) "he was forced to defend his country because Nato was going to crush him".
Why did Putin attack? I can imagine he deluded himself[1] into thinking that Nato/"the West" wants to conquer Russia, and engineered Ukraine into falling into Nato's sphere of influence (so Western propaganda lying to the Ukranian public, who then forced Yanukovich out). But I imagine for Putin this explanation is easier to believe than the thought that people in the Baltics and even Russia itself don't like thieving bastards, because to do that he'd have to admit his corruption is something unsavory.
And you're sort of arguing the installation of weapons means Nato was going to attack Russia, but WTF, how about Putin look at himself if he's been behaving threateningly to justify a neighbor to install weapons? Who's the one who was the aggressor who annexed Crimea? (oh no, that's another can of worms, "Putin had to do that because the West was going to cut off the Black Sea access!", right?)
[1] The legend is that he was isolating so much due to Covid, he started to develop these theories.