Why is North Korea Mad at us ? ( America )

North Korea Is mad At America Because They Don't Have everything that we have and their also mad because we wont send them the stuff they want. They are also mad because after world war 2 was Over The country was split! The North side was handed over to Russia, While the South side was handled by the USA. But On the other hand after i read through other Stuff i realized North Korea is not really mad at us, There Technically Still at war with South Korea And The USA is just there Closest Ally. Thats all i really found didnt really read that much but yeah thats it ! :))