Americans can come to my country with few limitations (Canada), and it shouldn't be overly hard to get either dual citizenship or to become a Canadian citizen. Our immigration policies are not nearly as strict as other places and we have a gigantic, and mostly undefended border with the USA. Little more than border guards stand in the way, and as long as you're not a felon, and you have a legitimate reason to enter the country, you're welcome here.

We have universal healthcare available to all citizens.

Once here it's a matter of getting an employer who will sponsor your work visa... Then it's a pretty clear path to citizenship from there.

We're not super different from the USA. More taxes, no guns. Some other differences. But we're like... America lite.