But if life was really better in those countries I'm sure people would be lining up in embassies to go there, but they don't, they come to the US instead.

To be fair. While the US is a little above the EU in terms of migration, it's far from the top.

I've lived in one of those "better" countries, but I took the first chance I had to come to the US and I never looked back. I'm going to finish my engineering degree soon, with a good, well-paying job lined up. One day I hope go back to my country and see how far all of those 'metric' got my friends.

And I'mma level with ya here. I had the same view when I was working towards my engineering degree. As did many of my peers. Less than a decade post graduation and those "metrics" are looking mighty nice.