Secondly, the examples of crime that you used are all very relevant and applicable to the claim you’re making. However, it seems to me like at least two of those were due more to the tourist’s mistake than to just plain lack of security. Mr. Alvarez was carrying $1,700 on him when he was robbed despite, as you mentioned, tourists having been warned not to carry large amounts of cash. I’m not trying to justify the crime or downplay the fact that it happened, but even in the US it’s never a good idea to simply carry around large sums of cash for extended periods of time (at least not for the average person for whom $1,700 is a considerable amount). So while the crime did happen though it shouldn’t have, the gravity of the situation was greatly increased due to Mr. Alvarez’s poor decision. In the same way, Mr. Itai’s decision to visit a favela was an incredibly poor (and, frankly, stupid) choice. In the same way that you can’t just walk into a completely gang-controlled neighborhood in New York and expect it to be a pleasant walk in the park as if there’s no chance of anything happening to you, you simply cannot go visit a favela and think that you run no risk of being robbed either. Sure, it doesn’t always happen and most of the people that live in favelas are good and honest people, but it’s simply irresponsible to try and go on a favela tour (I never understood how that’s even a thing) especially when you’re clearly a tourist and thus just making yourself an even easier target. So while ideally the crime shouldn’t have happened, Mr. Itai should not have been in that situation to begin with, which makes it hard to say that because of a tourist’s poor decision they have lost faith in the country.
On a similar note, the fan fest incident was indeed alarming, but it was also an isolated incident and hardly a repeated pattern throughout the entire month-long event. The bus burning is also not just something that happened because of Brazil’s defeat to Germany – it’s a rather common form of protest vandalism, unfortunately. So while on that particular night the bus burning was due to the game, it wasn’t exactly an extraordinary form of violence (none were injured in the bus burning itself) but rather something unfortunately customary for irresponsible vandals.

And just to be clear again, I’m not trying to excuse or diminish the crimes that you mention and that took place – ideally they should never have happened. However, I think your conclusion that Brazil lost the WC ‘on all accounts’ is pretty out of sync with the majority of opinions and testimonies, and your generalizations about the success of the WC are rather thin and based on superficial analysis. I fully agree that Brazil should have done a better job at security (and many other things, for that matter), but I think it’s unfair to claim, as you do, that what most people are calling one of the best World Cups in history was actually an all-around failure on Brazil’s part.