The edge cases of immigration/naturalisation rules seem to suck everywhere.

I'm extremely privileged that my experience with naturalisation in Sweden was very smooth. At the same time I lived 5 years with some anxiety due to numerous cases of mishaps with immigration processes from personal contacts.

It includes high-skilled immigrants being deported due to a past employer not paying worker insurance, something that as a worker you're never aware of in your payslip, contract, etc. Includes couples being separated for years, waits of weeks to months for getting a permission to leave the country to care for ill relatives without affecting their process. All of it just for the sake of applying rules, not empowering immigration case agents to take decisions pending further reviews, or a justice system that is rigid on the application of rules (as was the case of the missing worker insurance, which affected a few other people).

Living with those reports from others close to me always kept me on the edge of what could happen to me, and this is a great country as an immigrant, including in terms of bureaucracy.

I can't imagine other places with much more confusing and contradictory immigration systems...