I think Putin was actually extremely clear why he invaded Ukraine. NATO was expanding to Russia's border
https://nypost.com/2021/12/23/putin-demands-nato-not-expand-...
Ukraine was hostile to the Russian people, banning their language in schools and refusing to uphold neutrality. France tried to broker a deal before the war broke out (upholding the Minsk agreements).
https://www.wsj.com/articles/putin-to-meet-macron-as-france-...
> Sure, but this fear of "ending up like Gaddafi" still doesn't doesn't make for a justification, or even an explanation, of why Putin thought it was a good idea to invade a neighboring country. Egging "The West" on made that worry much closer to becoming real. If Putin wanted to be left alone, he's done the exact wrong thing.
The west supported a coup in Ukraine, overthrowing the elected leadership of Ukraine.
https://www.aljazeera.com/news/2021/6/22/russias-putin-accus...
Russia then attempted to negotiate with the new Ukrainian government
https://en.wikipedia.org/wiki/Minsk_agreements
Ukraine openly ignored the agreement and has been seeking EU / US involvement. Immediately before Russia invaded there was a massive increase in shelling (noted by international observers as well). Which could easily lead one to believe Ukraine was about to start another push into Donbass
https://www.reuters.com/world/europe/russia-says-sharp-incre...
Just prior to Russia invading, Ukraine was openly discussing the attempt to obtain nuclear weapons
https://www.dailywire.com/news/president-zelensky-suggests-u...
Everything points to expansion of the west, which triggered Putin's fears.
I'm not saying he should have invaded, he effectively lost in the political influence game, so he switched to the kinetic realm. But in his mind he thinks NATO is out to destroy him and his civilization (his own words). It makes sense if you watch what the west has done to people like Gaddaffi, Serbia, or Iraq. I'm not supporting anything here, but am pointing out the mindset.