All-round comparison, Canada, the United States, Australia, where do immigrants go?

Let me talk about the characteristics of each country first:

The United States: strong, high-tech, developed social progress, large population, noisy living environment relative to Canada, relatively high risk system, low prices, suitable for career development, and some States are suitable for providing for the elderly; One more thing, immigration is very difficult.

Australia: immigration is difficult and noisy. Some China people there are not particularly friendly and relatively closed.

Canada: Life is comfortable, quiet and safe, with moderate development and low prices. There are still some opportunities for immigrants, but the temperature is relatively cold.