The PSUV is a democratic socialist party assuredly but the executive branch of the government is still too unaccountable, and the judicial branch has now been suppressing some of the other left parties and some PSUV members. It's the same way even if the US had an active democratic socialist party in power, the US would not be democratically socialist due to how screwed up the executive and judicial system is. The good the PSUV has done for the country is great, but the institutions of the Venezuelan government are not democratic socialist. I'm not at all questioning the elections or legislative system, but the nature of the state institutions which I think they did have the power change democratically (though this is debatable) but for whatever reason they did not. Similarly the US will not be able to transition through democratic socialism (if such a transition is possible) without huge changes, made by the legislature and the people, to the executive and judicial branches, and to the legislature itself.