As far as sanctions go, the profits generated by Citgo were flowing into the country until 2019. The ship seizures are a very recent thing. Cuba likes to point to the trade embargo with the US as the source of all their economic ills, even though they could get everything they needed from other countries.
If the Suns Cartel is still active, how does it survive in an authoritarian country without being destroyed- the jungle isn't as dense. LatAm has very corrupt people, but whatever you want to do, you must have 'permission'.
The jungle is dense but that ain't a problem because the Cartel de los Soles top dogs all sit in Presidential, Ministerial and Senatorial suits in Caracas. Venezuela, being the mismanaged shithole that is, has since decades moved onto industrial level of narcotrafficking and other illicit activities to understut its crumbling economy. Never mind the personal profits obviously, these people have becoming filfthy rich of speed-boating the jejo onto American shores. Disclaimer: whenever Venezuelan narcocommies get the spotlight put on them at least one detractor will immediately crawl out of the sewer to start waffling about da CIA, calling it here.
Caracas' dirty dealings are actually much worse than just massive drug trafficking. Venezuala's main intel agency is directly involved in seeding Tren de Aragua and Cartel de los Soles members in the US, and they ain't there to work the fields or run carwash joints if you know what i mean. Happened in several other countries too bytheway, one of the reasons Venecos have such a bad rep and many neighbouring populations are quietly praying& hoping for US intervention so that all the high crime Venezuelans can at least get booted back over the border.
In the geopolitical spheres the Venezuela-Cuba-Nicaragua axis is a regional alternative to US patronage and power projection. This trifecta might sound unimpressive, but they are on a foreign payroll and punch far above their weight - much like modern UAE+Qatar do elsewhere. Cuban interference in much of the African and South American continents is a widely acknowledged feat. In Latin America this influence can be seen in the Foro de Sao Paolo, with many recently voted in Trotskyites in Mexico City, Brasilia and Bogota all taking sides against DC. That group was even bigger until pro US forces scored electoral victories in Buenos Aires, Santiago de Chili, La Paz, Quito and Tegucigalpa. Right in time too, because many of the booted out leftoids in places mentioned above were not exactly in the mood to leave, just a few weeks ago Honduran Prez Xiomara Castro was in the process of muscling out a pro US candidate until her own generals (backed by DC) made it clear that she did actually lose and it really was time for her to go.
Foro de Sao Paolo is a regional initiative but as with most deluded authoritarians Maduro's ambitions reached far beyond his own continent. In the last 25 years Venezuela has aligned itself with the communist bloc+ Iran, and Maduro indicating that he's willing to base Tupolov 30 nuclear capable long range bombers is going to be his downfall. There is just no going back from offering yourself to be a vessel for the impending destruction of the US homeland.
There are more variables, Trump has mentioned the Venezuelans nationalizing the oil sector several times already. As for the Cartel de los Soles' commie narco buddies in Colombia, the ELN, they have already stated that they will fight on the side of Maduro. Goes to show that the narcostate frame is more than just a spin, it's truth.