My view is that the split with Putin really started in late 2003, when Putin rejected an Exxon offer to take a controlling stake in Russian oil via the purchase of Yukos, and then jailed Khodorkosky (who was close to various USA interests) on tax evasion charges. Prior to that, Putin got a lot of favorable mention in the US press, he visited GW Bush in Texas, was an ally in the 'war on Terror' etc. If Putin had taken the offer, Russia would have become more like Saudi Arabia - i.e. part of the petrodollar recycling system. Putin's domestic popularity in Russia since then is largely due to the fact he redirected oil money to domestic economic growth and military reconstruction, rather than to Wall Street funds.
Everything since then has been one pipeline war after another, from the perspective of energy deals at least. Georgia 2008, for example, was "not a pipeline war!" according to the Guardian (meaning a lot of people were saying it was, and they were pushing back). Note how the 2006 BTC pipeline route (Baku-Azerbaijan-Turkey) was chosen to bypass Russia?
https://www.theguardian.com/world/2008/aug/11/georgia.russia...
After that, there were the two competing pipeline deals in Syria, c. 2009-2010. One was a Russia-Iran deal, one was a Qatar-Saudi-USA deal. In 2010, Assad took the Russia-Iran offer, and in 2011, Obama's government OKed a CIA destabilization-and-regime change program in Syria. If Syria had taken the other offer, I doubt that would have happened. This Ukraine war is just more of the same (plus, a new Cold War is good for military procurement budgets).
Of course, energy geopolitics isn't the only issue, but anyone who has read Steve Coll's "Private Empire: ExxonMobil and American Power", or Daniel Yergin's "The Prize: The Epic Quest for Oil, Money, and Power" will recognize it's often the central reason for international conflicts.
As far as the clearly reprehensible human rights record of Putin being the reason for the conflict, that's laughable - just look at Mohammed bin "Bone Saw" Salman in Saudi Arabia, or the Yemen war. Now if MBS pulled out of Wall Street and ended the Saudi roll in petrodollar recycling, then we'd be hearing about the need for regime change. And if Putin and Assad had signed up for the petrodollar program, they'd be lauded as democratic reformers, and the Ukraine invasion would portrayed in the US media as a necessary action to dismantle neo-Nazi militias (see Yemen, again).