Here is the link to the 2016 Latinobarómetro report/results, hot off the presses. Support for democracy has taken a slight hit, but still is just around the average for the past two decades. At the same time satisfaction with democracy is going up. Supports for governments have gone significantly over the past 6-7 years.
There's a lot of noise here. Despite all the problems in Argentina, 80% are satisfied with life. People in the Dominican Republic are satisfied with most everything (why?). Of all countries, Peruvians are the most concerned about crime, whereas Venezuelans--who suffer tremendously from crime--are barely concerned. Venezuelans aren't even much concerned about the economy (6%) which seems to make no sense at all until you see that "shortages" dominate, which I wouldn't separate from the economy. Yet even though Peruvians are concerned about crime, only 6% are actually afraid of being a crime victim. Nicaraguans feel pretty good about things, but only 41% support democracy. Indeed, 61% of Nicaraguans say it doesn't matter if a government isn't democratic as long as it resolves problems. At the same time, only 31% of Venezuelans say so (second lowest in the region) even though that's been going on for some time, which speaks mostly to how unpalatable the opposition is.
The question of supporting non-democratic governments is, I think, a key one. The region seems split. As a whole that support is going down, but it is very strong in some countries.
This is why democratization in Central America is so difficult. People want results, and may prefer democracy but won't necessarily demand it. That Brazil number is high too.