Regarding the haircut thing: that's actually a myth: https://youtu.be/2BO83Ig-E8E
Unfortunately it's myths like this that are shown as evidence of the /entire/ narrative around NK being false, by those who treat NK as a socialist paradise. There is a lot of poor journalism on the topic (see: myth that NK claimed to fire a rocket into the sun, myth that NK claimed to have found a unicorn, claims that KJU doesn't poop, etc) and as such it's easy to simply say that it's all made up.
Certainly not justifying those arguments at all; this just shows how easy it is for the less-critical on any side of an issue to believe whatever they want because of a few counterexamples.