Quite accurate plus ad a portion of envy and jealousy on the Argentinean side because this annoying Chile FLY gets so much praise internationally and is acclaimed as a the Model to follow. Its like a hot Chile up their asses...!!
Yes, it's true that many, but not all, Argentines, do not like to hear that things might be going well for Chile. However, to be fair to Argentines, I think they are so often stigmatized in Latin America as being arrogant, and what I found out, after living in many places in Latin America, is that Argentines are no more or less arrogant or nationalistic than any other group in Latin America. When I lived in Mexico, once I was sitting at a restaurant with a friend from New Zealand, and two US friends, and a Mexican. The Mexican told us flatly, "Mexico is the greatest country in the world." I have pretty much gotten that most places I have lived.
However, Argentines will never say that. They might say, we have great women, great food, great wine, and the best soccer, but they'll mostly just complain about the rest. And the arrogance? Sometimes that's just the fact that Argentines and Portenos are very confrontational as opposed to other Latin American countries/cultures, where there isn't much confrontation and it is considered impolite. So often people from Argentina get classified as arrogant just because they will stick up for themselves and push people to change their behavior.
Chile though? I must say (with all due respect to the Chileans that are on this forum), that nearly every Chilean I have ever met (and I do not have a huge sample size) is unbelievably nationalistic and also arrogant to boot. They were nice people, and I consider them my friends, true. But man, how annoying can it be to listen to someone talk about how great their country is for two hours? So I actually think some of the things that Argentines say about Chileans are somewhat true, based on my experience. Chilean men are also much more machista, which is something that personally, really grates my nerves. So I respect Chile and am glad their country is doing better, but something tells me I would not enjoy the people there as much as the people in Argentina.
My experience has also been that a host of things that other people in Latin America say about Argentina are complete hogwash. Some of it can be true, but a lot of it is complete crap.