That is not a good analysis. Both North Korea and
Russia claim to be democratic countries - see
the name "Democratic People's Republic of Korea".
I always took this as warning that "We the People", can also be the cause of why those freedoms are taken. Cue the US electing convicted rapists and Brazil almost electing an US agent...
You could replace the constitution of North Korea with that of the United States without a single thing changing in practice.