Their Spanish is awful
I'm a fluent Spanish speaker of Mexican origin and often watch films in Spanish without subtitles. Then I saw this movie. Holy crap was it hard to understand. You can hear the Italian influence. Argentina has to be the whitest country in South America. They don't have much of that indigenous influence on their language, which is probably part of the problem. Mexican and Columbian Spanish are the best because they're easier to follow and are more pleasent to the ear.
If my thought-dreams could be seen, they'd probably put my head in a guillotine.