The Interview
This 2014 Seth Rogan/James Franco movie depicts two American journalists who attempt to infiltrate and assassinate North Korean prime leader Kim Jong-un. It doesn't take a genius with a political sciences degree to understand why this wasn't received well.
The World Just Hated the Idea
This movie got banned in Russia, where the political powers use the media to paint Kim Jong-un as a stable world leader with equal power to the US and allied territories. Needless to say, Kim Jong-un didn't like this depiction of his likeness. But, all American movies are banned in North Korea anyway, so it's likely that the general population there doesn't even know that this exists.