Here’s an overview of American sanctions on Venezuela:
https://fas.org/sgp/crs/row/IF10715.pdf
The economic sanctions are focused on restricting their ability to issue or trade bonds through their oil company and CITGO in US financial markets. This was already limited without sanctions, because no one was lending to Venezuela in the first place, with their economy melting down since oil price crash in 2014. To bolster my earlier point, these limited economic sanctions were only introduced in 2017 under Trump.
Prior to that the only sanctions which existed where targeted on individual government officials accounts. Venezuela’s crisis now is at least 5 years old. There’s simply no correlation between their economic state and these sanctions.
This is not like Iraq, or even the renewed Iran sanctions, where sanctions were also
imposed on oil revenue. It’s ironically America refineries which have always lobbied against this because many in Gulf coast are built to refine heavy crude like that found in Venezuela ( and Alberta).