According the the Wikipedia page, Kim Jong-un is on record as having questioned the lavish lifestyle he had. His then-ousted brother was actually downright rude suggesting that the Chairmanship should not be inherited but rather democratically elected (this from a Japanese news report I heard -- I can't really vouch for its veracity, but interesting if true).
I remember when Kim Jong-un came to power and there were reports that hardliners in the party really hated him because they thought he was too soft. When he took over, he did do a lot of thing differently, like going to a pop concert with his then wife.
But then, suddenly: His wife is executed. His uncle's entire family line is eradicated. His elder brother is assasinated. And we hear no more about Kim Jong-un's "softer" approach to running the country. Any time I look at video from about 2012 to 2016 he looks like a deer with its eyes caught in the headlights. Lately it looks like he's got his feet under him and I figure it's because he's learned how to play ball.
I don't know. Like I said, I'm really just being playful, but western governments like their "Axis of Evil". You need the mad, evil villain to justify whatever they decide must be done (Wikipedia page mentions an attempted CIA led assassination...) What if it really was the case that Kim Jong-un is as much a victim as everyone else. Forced to take power. Forced to execute his wife, his uncle, his entire uncle's family and even his older brother. The entire country really being run by a brutal bureaucracy that doesn't care who they steamroll. That would be pretty craptastic.