Our Friend, The Meter
Yet America has one of the highest (if not the highest) levels of immigration in the world. It may not be a great place to live, but it's a good deal better than many other places.
Go and live in Zimbabwe or Uganda for six months, then complain about bad government. You think the police, or racism, are bad in the USA? Try living in South America! Yes, of course the USA has problems, but they're very, very small compared to what people in other parts of the world have to put up with every day.
(And I say this as a non-USAian).