That's some spin of the UK side of things. When the USSR was looking in vain for an alliance with France or the UK, France and the UK instead made a pact with Germany, handing Czechoslovakia to Germany.
Insofar as the UK and imperialist powers seeking to conquer others by force - Scotland, Ireland, India, Hong Kong and the Opium Wars, Australia, Iraq, Africa from Egypt down to South Africa, I can go on...
> Despite producing a lot of important results and some painfully beautiful math books, like Gelfand's Linear algebra, it has more or less zero effect on the wider society or even wider intellectual discourse.
In Computer Science we have Adelson-Velsky and Landis's self-balanced binary trees, and many other results, as well as other results in math and the sciences.
In engineering and otherwise the USSR launched the first satellite, person in space, sent the first probes to the moon and other planets, and pushed the US into space.
The civil rights moment in the US was often accused of being communist because - a lot of it was communist, and supported by the USSR, at least in the days of Paul Robeson and the Scottsboro Boys and Martin Luther King at the Highland Folk school (billboards through the South had a picture of King there "King at communist training school"). Actually if you watch the Nightline of Mandela coming to the US, half the speakers accused him of being a USSR-aligned communist. The USSR contributed to the anti-colonial struggles around the world - from China to Cuba to Vietnam, and contributed to it in other countries like India.
Plus it did most of the fighting in WWII for the US and UK to defeat Germany (of course nowadays the US and UK flipped it to Germany against Russia).
The USSR also helped push a blue collar working class proletariat into a kind of middle class. This began being rolled back even when the USSR still existed but was weak, and is still being rolled back.