Ukraine

Do escapees of NK often express disbelief that the rest of the world dislikes the country they escaped from? Your question seems to be a non sequitur.

North Korean escapees almost exclusively did so against the wishes of their government, and almost certainly have a dim view of them. This is likely reflected in the view other people have of them.

Russian citizens are almost all free to leave, and often still have a positive view of their home country.

That's a really interesting point. Maybe because the North Korean govt is seen as persecuting it's citizens. Therefore it's citizens are seen as the victims (despite some citizens being the perpetrators).

Whereas Russian citizens are seen as the perpetrators (as invading soldiers) along with the leadership and surrounding countries are seen as the victims.

While Russia is fascist as heck, it is still substantially easier to emigrate from Russia than it is to emigrate from North Korea. Also, while there is a powerful state media in Russia, they do not have complete (or near complete) control over every line of communication in and out of the country as is the case in North Korea. There's also the matter of relative wealth and ability to defy/evade government control by way of travel/media consumption/emigration.