It's worth noting that there was an apparent real opportunity to resolve the Russia-Ukraine conflict in April 2022, via diplomatic negotiations, but UK's Boris Johnson reportedly disrupted those talks by threatening to withdraw UK/US support for Zelensky if he proceeded with negotiations. If the war had been resolved and sanctions on Russian export of gas to Europe had been lifted, this would have lowered gas prices…
Even if your claim is true, it still would have been the smarter long term move to keep the war going. The prospect of a western aligned russian regime is so valuable it's worth fighting (and funding) the war for.
But, seems a lot of western leadership is blind.