You're right, Gallup is very well respected. So let's see what other Gallup stuff on Venezuela says.
"Signs of the frustration and anger on display in Venezuela's streets in February were evident late last year as Venezuelans' ratings of their lives deteriorated to their worst levels in years....[inflation] pushed Venezuelan pessimism about the nation's economy in 2013 to an all-time high... Venezuela's high crime rate is another issue contributing to residents' angst. The country has one of the highest murders rates in the world, creating a climate of fear and a permanent sense of insecurity"
http://www.gallup.com/poll/167564/venezuelans-rated-lives-worse-ahead-protests.aspx
This is quite an interesting one, on attitudes about Chavez (after he died). Approval rates were relatively high, mainly on efforts to combat poverty. Problem of course was the way he did that, which has led to the kind of problems Veronice describes today.
http://www.gallup.com/poll/161756/special-briefing-chavez-legacy-venezuela-future.aspx
"Even before the ongoing massive protests in Venezuela, the majority of residents feared for their country's political stability - for the first time in recent history... Confidence in the national government fell to a record low ... The majority of Venezuelans said they have no confidence in the national government.... few Venezuelans said they have confidence in the country's judicial system, which as far back as 2004 the human rights advocacy organization Human Rights Watch said had been politically overtaken by then-President Chavez and his party."
http://www.gallup.com/poll/167663/venezuelans-saw-political-instability-protests.aspx
"Residents of Venezuela and South Africa are the least likely among residents in 135 countries worldwide to say they feel safe walking alone at night where they live...Venezuela's crime problems are among the worst in the Latin America..."
http://www.gallup.com/poll/162341/venezuelans-south-africans-least-likely-feel-safe.aspx
Lesson: if something looks odd, better not to just accept it at face value, but see if there is corroborating evidence. In this case, that index remains the odd one out. And again, please read how they do the survey. Did you do something interesting yesterday? Did you laugh yesterday? Tell me, when you think about how happy you are with your life, are these the factors you evaluate? How would you compare laughing yesterday to living in " a climate of fear and a permanent sense of insecurity"" (Gallup's words) when evaluating how happy you are ? A little common sense can go a long way.