Which English-speaking country is the easiest to immigrate?

Canada's advantage is to get a green card in one step, which can be applied through skilled immigrants and investment immigrants; The United States also gets a green card in one step, but it is more feasible to apply for immigration through EB-5 investment at present, and the whole family can get a green card within one year. The only drawback is the high investment, which requires an investment of $500,000 and will be paid back in five years. In Australia, skilled immigrants can also get green cards in one step, but the requirements for English have increased. Investment immigrants can only get a four-year visa first, and can only transfer to a green card after starting a business in Australia.