What socialist county has a better standard of living than the US?
What's your standard of "socialism"? If we go by what most Americans think socialism is rather than the super duper looper mega literal technical definition of the term, and we go by how it treats the middle of the pack and poor people as apposed to the countries' upper echelon when it comes to things like health, wages, education, and a social safety nets...
(Lets be honest a crap ton of people that like to say all those European countries are really just capitalistic ones are also usually the ones that will bitch about us moving towards socialism or communism when we move to be even a little bit more like them. It can't be both ways For all practical purposes Americans consider them socialistic The average person out there and definitely the overwhelming majority of Republican don't give a crap about what some political science textbook somewhere says even if it's technically true. On a practical level this is how the US views the issue and views that word.)
...Then in no particular order: The UK, Ireland, Germany, France, Italy, Spain, The Netherlands, Iceland, Sweden, Finland, Norway, Switzerland, Slovenia, Lithuania, Canada, New Zealand, Croatia, Austria, Australia, Japan, South Korea, Belgium, Israel, Taiwan. That's what, almost 30 of them just off the top of my head. I'm sure I'm forgetting a handful as I didn't want to pull up a world map just to search out more. Hell, even a lot of the ones a little lower than the US probably still kick our asses in some of the metrics that matter to most of the people living here.
Keep in mind with the sole exception of Switzerland the US has more wealth per capita than any of those places, so that also can't be used as an excuse of why places like the Nordic countries do better than us. All those places above, it's not their monolithic culture or ethnicity. It's not their small size or population. It's not their oil wealth or tech industries. It's just that they generally give a damn about the lives of the people within their countries. We don't, and we could do even better than them if we wanted to as we have more resources.
I'm not a fan of Cuba for many reasons. If one wants to despise it's leadership I won't fault them as it's deserved, but I could also point out that the analogy above is intellectually dishonest as it totally lacks context of the circumstances around it. Cuba pissed off one of the world's only superpowers and one that was very close to it. Of course when the US engaged in economic warfare against it it was going to come to to that outcome no matter what. Lets not pretend Cuba ended up in it's economic situation organically without extreme outside influence making it so.