The grass is always greener. I'm gonna step up to the plate for the USA here...
There are issues, but if I had to start all over, I'd still pick the United States. Ten times out of ten. I think it is unequivocally the best country to live in if you're a high achiever. And the social safety net, while it should be far stronger in my opinion, provides a decent standard of living (globally speaking) if you're not as lucky. Essentially I'm betting on myself becoming a high achiever, with low-middle income life not being such a bad consolation prize if I'm not.
Organizing my thoughts under a couple of random headers based on whatever I'm thinking about at the moment.
Healthcare
It is a rough week to talk about healthcare, with the administration pulling CSR payments. This is going mean premium increases for middle income people on Obamacare, and that really sucks. I think we should guarantee universal coverage, but we really weren't that far off. About half of people are covered through an employer plan, with another 30-35% covered through public programs. Just around 10% of non-Senior Americans were without insurance as of the start of the new administration.
What we were doing had problems. Problems that could have been (and maybe still could be) addressed. But a majority of Americans have access to really good healthcare.
College
I supported Bernie Sanders and his movement for free college. But really I only supported it because it is a progressive policy, benefiting low income people, and we need more of that in the USA. Practically speaking though, I am frequently disappointed by the level of education I see from my fellow adults, but on the other hand, the USA already offers 13 years of publicly funded education. What is another marginal 4 years worth? I really don't know. Put another way, what do we actually think the benefit is, of pushing more people into more years of pedagogy? Especially in light of the fact that many college grads are currently underemployed anyway. A reduction in debt for these people would be an obvious good, of course.
Parochialism
The grass is always greener. US news tends to focus a lot on US issues. Which makes sense. But while we're worrying about the impact of CSR subsidies, or whether or not our President will make what should be a total layup to condemn white supremacy, it's important to remember that other countries have issues too.
Imagine trying to retire by dollar cost averaging the NIKKEI in Japan. Imagine trying to FIRE in the UK when a momentary flirtation with nationalism causes a referendum that may exile you from many trade agreements, causing your currency to lose 20% of its value. Imagine living in Spain and having to sweat out what it would mean for public debt and social program funding if the very wealthy Catalonia were to declare independence. Imagine living pretty much anywhere in Western Europe, looking to the East as China amasses more military might, and Russia encroaches further into Europe, all while your relationship with your most powerful ally is becoming more erratic and tenuous.
Everybody's got problems.
Diversity
America has everything in terms of location and culture. If you want to live in an economic powerhouse, major metro, with vibrant Hispanic, black, and south east Asian communities, the US has it. If you want a seaside fishing community with four distinct seasons, the US has it. If you want a cheap McMansion in a suburban mono culture where you rarely need to turn on the heat, and you never see snow, the US has it.
Miscellaneous Reasons America is Great
Everyone wants to be here. Not just poor workers looking for a better life. Foreign real-estate investors prize land in US cities. Techies are trying to get to San Francisco. High finance types are trying to get to New York. Entertainers are trying to get to Hollywood.
The National Parks are awesome. They're super cheap. Anyone can go there. Incredibly Beautiful. Impeccably maintained.
The Interstate is awesome. And road-tripping in America is a unique experience
There are lots of things that the US gets wrong, of course. Lots and lots of areas to improve. But we get a lot right, too. And other places get things wrong.