I’ve heard about the Venezuela private sector hoarding food but not about the exporting, where can I read more about that?

he talked vaguely about Maduro “mismanaging” the Venezuelan economy even though the food shortages were the direct result of the US sanctions and also the private sector (i.e. the part of the economy Maduro can’t control)

That’s not entirely true, like, the sanctions played a major role but only after the crisis had already become severe. The first sanctions weren’t incredibly heavy. Also yes, they were indeed a result of the private sector but it’s not true that he has no power over the private sector. The price control thing was his attempt to stop what was happening by exerting force on the private sector, and it was also the wrong way to go about it. There were many very stupid moves by Maduro at many points.