Oh he indeed dedicated his life to the people. In a peculiar way.
Can you imagine what would happen if they all found out that they live in such a shitty country though? Mass suicides, you'd get emmigrants disconnected from our reality and probably a domestic war or two.
His son is inexperience but apparently educated (in Europe). There are various opinions on him though. Some claim that he's been extremely shy, that he stayed away from all people while in Switzerland and had only one friend for all those years. Some claim that when he finally gets to meet people he's aggressive, cruel to women and drinks a lot.
He knows that what he has to do is what Kim did. Also, it's not like he rules the whole country. He has his people to do things. He just needs to be good at being praised.