As an American who immigrated to The Netherlands I would like to know of this mythical country in the world with a working immigration system. AFAICT they're all rather broken.
US immigration might be broken in different ways than some other countries, but from the many stories I've heard of friends moving all over the world, they all pretty much suck.
Australia. I got my PR (green card equivalent) after working 3 years and applying for citizenship now (5 years since I arrived here). Spent less than AUD 10k total for immigration, including my partner visas. Processing times are reasonable and very transparent.
It's not a perfect system but way better than most countries.
Singapore used to be ridiculously awesome (work visa approvals usually processed in under 24 hours), but they've really tightened the screws in the last few years, particularly on granting permanent residence, due to political reasons.
Canada is pretty good. The points system sets a reasonably high bar but at least it's fairly objective. Once you're in the path from temporary foreign worker to permanent resident to citizen is well defined and works fairly well despite the slow processing times.
US immigration might be broken in different ways than some other countries, but from the many stories I've heard of friends moving all over the world, they all pretty much suck.