You can also verify the results here https://macedoniadelnorte.com/ (a whole story behind this hostname). Again, only possible by the María Corina's huge effort
Not everything is about oils or some conspiracy of western governments.
Let's be real, sanctions play a big role in the economic decline of Venezuela.
Saudi Arabia isn't a democracy. In fact, it's a very problematic totalitarian regime, where women have limited rights and the royalty has been known to kill enemies. They very much mismanage money, with ridiculous projects, ostentatious lifestyles if you're royalty or the elite, and have the "highest prevalence of modern slavery of all countries in the Arab States region" [1].
Saudi Arabia is doing well economically though because it isn't sanctioned by the USA, and you don't hear bad press about it's totalitarian regime, or corruption, etc. because it's a USA ally.
If the USA cared about how people are treated by their government, they'd be in Sudan or Congo. The USA cares about getting rid of Maduro, so they will make it as difficult as possible for the Venezuelan regime to make money from its oil, while pointing out all that's wrong and blaming Maduro for everything.
I'm not saying things are well in Venezuela, or that Maduro is a good leader. I'm saying this is all part of a playbook that's been successful before, and it's reductionist to not blame the USA for Venezuela's decline.
[1]: https://www.walkfree.org/global-slavery-index/country-studie...