Socialism, not US sanctions, ruined the Venezuelan economy
US sanctions against Venezuela are barbaric and immoral. But, they are not responsible for the economic collapse that has transpired in Venezuela over the past twenty years. Yes, the sanctions have further reduced the standard of living in Venezuela, and the burden of relative impoverishment caused by the sanctions has fallen hardest on those at the lowest end of the socio-economic ladder.
However, the effects of these US-imposed sanctions have not been nearly broad enough to be responsible for the general collapse of economic conditions that we now see in that country.