America is the country with the biggest chip on their shoulder.
America has a long history of feeling like they are the underdogs and needing to prove themselves. This dates back to when America was first formed, as colonists rebelling against England. They has been a strong sense of needing to be independent and stand out from everyone else.
This mentality has continued throughout American history, with a focus on being the best in everything. And while this attitude can be seen as motivating, it also leads to a lot of anger and resentment towards other countries when America doesn’t win. America’s chip on their shoulder is one of the reasons why they have such a tense relationship with other countries.