Yes, the hate towards the US is justified
The term anti-Americanism, or anti-American sentiment, refers to opposition or hostility to the policies, culture, society, economics, international, or superpower role of the United States. Common contemporary negative stereotypes of Americans incl... ude that Americans are: aggressive, arrogant, ignorant, overweight, poorly dressed, materialistic, obsessed with making money, too moralistic, and generally obnoxious.
Political scientist Brendon O'Connor of the United States Studies Centre suggests that Anti-Americanism cannot be isolated as a consistent phenomenon and that the term originated as a rough composite of stereotypes, prejudices and criticisms towards Americans or the United States, evolving to more politically based criticism. French scholar Marie-France Toinet says use of the term "is only fully justified if it implies systematic opposition – a sort of allergic reaction – to America as a whole".
Discussions on anti-Americanism have in most cases lacked a precise definition of what the sentiment entails (other than a general disfavor), which has led to the term being used broadly and in an impressionistic manner, resulting in the inexact impressions of the many expressions described as anti-American