They are allegedly a rather mediocre team which is led by one very good player, whom some people also think is overly hyped.
I'm not one of the people that thinks Messi is overhyped, I think he's legitimately the best footballer on the planet, but I agree with the rest of that statement.
I get all that and agree. But the hatred of Argentina is akin to Lebron and the Heat. Personally, I like Lebron but hate the Heat because they are a dummy puppet organization who's evil mastermind is bent on global domination.
I don't see Argentina ruling the world anytime soon, regardless as to who is running the Vatican. So why the Argentina hate beyond lousy hero-ball style futbol?