Tell me you know nothing about Asia..
Oman: a wealthy Gulf state where huge sections of the workforce are imported labourers from India, Pakistan, Bangladesh and Africa who can spend decades there without any realistic route to citizenship or equal status. Until recently, many workers were effectively tied to employers through sponsorship systems that human rights groups repeatedly criticised for exploitation and lack of freedom.
Malaysia: has ethnicity-based advantages built directly into state policy. Malays receive preferential treatment in university admissions, housing, government contracts and parts of the economy.
Japan: extremely restrictive immigration and citizenship systems, weak anti-discrimination protections, and longstanding social exclusion of minorities such as Koreans born there for generations. “Japanese only” signs in businesses still occur. Refugee acceptance is tiny by international standards.
Meanwhile in Britain, every citizen has equal legal rights regardless of ethnicity. Anti-discrimination law is among the strongest in the world. People from every background vote, hold office, run major companies, become judges, MPs, police chiefs, cabinet ministers and prime ministers.
And yes, people are VERY openly racist in all these places.
Britain is not a perfect society. But it's a lot closer than where I'm from.