They got worried that communism could be a serious contender to capitalism in terms of productivity and innovation (so far, that doesn't seem to be the case, unless people are high on revolutionary fever, have good leaders and there is some very strong motivation to work hard...)
I know one such country, but the problem is, their level of innovation is still stuck in the 1950s xD

The problem of every commie regime is, that it's in fact a two-layer system --- developed capitalism for the "dear leaders", and slavery for everyone else. Such a system will always suck at every aspect.