Don't forget that Russia (and thus USSR) started of as a poor agrarian nation to begin with, much behind in industrialization than the US, UK, etc.
The pictures of huge queues aside, USSR was a huge jump in standards of living and consumption for millions of people compared to before (which even included a tradition of serfdom).
USSR had also started quite early with non-central planning (NEP was a "free market" attempt similar to today's China), but ended it to quickly allocate resources between WWI and WWII to being able to withstand invasion. Quite prescient it was too.
I'd say USSR would have done much better without Stalin at the helm, without WWII that had a 30+ million human toll, and with NEP continued (it was stopped sometime in the late 20s).
>And the Soviets did not compete in "Science". They competed on military and space exploration mainly, but most of the other areas of Science were left dry by the Soviets, or left to crazy experimentation based on pseudo science in agriculture.
Maybe invest in some science history books? The "crazy experimentation based on pseudo science in agriculture" (Lysenko I guess) is a known early example (then again the west had its own share or pseudo science, remember lobotomies?), but they had tons of important scientists and engineers in all fields, much beyond "space exploration and military" -- from Kolmogorov to Basov, and tons of inventions we depend upon today...