I'm not sure what you mean by "didn't recognise Russia's contribution at the end of the war".
I've known for decades about the vital part Russia played in defeating the Nazis. It's even part of our national consciousness because of the Cambridge Five, whose motivation for spying for the Soviets included helping them in WW2.
So I've recognised Russia's contribution for as long as I can remember, in awe of the courage of many of the Russian people.
Should that recognition have taken the form of saying, "Take whatever land and people you want, Joseph, to do whatever you want with"?
No, I don't think so.
I used to find the Cold War-era, hysterical, Reds Under the Bed commie-bashing very irritating, but that didn't make me think the Soviet Union was a nice cuddly place to be.
Similarly I was glad when Gorbachev oversaw perestroika and more freedom for people in the Soviet Bloc, but horrified at the way Russia went about its economic reforms, enabling the growth of the oligarchs and the absolute trashing of ordinary Russians's financial situation. I was aghast at the particular sort of western capitalist consultants the Russians brought in to help make the transition, as I thought it didn't bode well for the Russian people as a whole. It''s this period of western consultants to which Putin now points to pretend A Big Boy Dun It And Ran Away, However it was a Russian decision to take this route in the first place. The Russian government didn't have to, and could easily have opted for less cut-throat models. Not least because it had the transitional experience of so many African countries to draw on, of how not to put your whole economy up for grabs by a few well-placed actors.
I also don't recognise the picture someone tried to draw upthread (or possibly on another current thread) of the US "failing to embrace post-communist Russia". My memory is that the US fell over themselves to embrace Russia. But again, embracing and seeking links with Russia didn't and should never mean forgetting that this is a major power which will act in its own interest. So embracing doesn't been giving carte blanche to.
I'm perfectly able to have immense respect for many of the Russian people (particularly those who risk their lives to try to build a better, more just Russia), while having nothing but contempt for the megalomaniac, empire-building dictator-for-life they are currently saddled with.