Theres not as much support for USSR or even socialism as you would like to believe. Of course people are not antagonizing it as much as western countries do, but you should also take into account that Russia uses Soviet imagery exclusively as an aesthetic selling point and does not attribute its successes to socialism but rather to the "spirit of the russian people". Experiences of older people are often dismissed as "grass was greener in my youth" and young people are very much fed distilled anti-soviet propaganda. The great problem with bringing back socialism to Russia lies with general political apathy of the people, getting through it would require rapid and substantial changes of the living standarts, be it good or bad. Best hope lies with China influencing Russian state, otherwise I see no "stumbling into socialism" on Russia's part without some great disaster to kick off radicalization.