Certainly the nationalizing seems to be part of it. Attacking the people producing said food for "hoarding" just to appease your socialist backers [1] [2], I must say, also seems less than helpful to my admittedly uninitiated brain. They've been at it for a decade.

[1] https://venezuelanalysis.com/news/11478

[2] http://www.nytimes.com/2007/05/17/world/americas/17venezuela...