You aren't viewing the whole picture, though. You're abstracting the Soviet Union from its historical context and measuring it against standards of an entirely different historical era. Further, again, you are placing far too much of an emphasis on culture while treating it as though it exists independent from the society and the social relations compelled by it. This is an idealist argument, not a materialist one.

Here's a simple exercise: why did women's rights dramatically expand upon the implementation of socialism?