Of course there's a brain drain going on, but in terms of the average canadian that's not the issue. the issue is that Canada's immigration policy far outpaces its ability to provide for canadians and immigrants, and the government doesn't care that their immigration policy is seriously injuring the quality of life for people already living in canada.
It doesn't affect the people in government because their politics makes questioning immigration targets and policies verboten and you could be ejected from polite society if you do. If you have a problem with their policies and the massive crisis its introduced to the country its obviously because of racism, right?
It literally has nothing to do with vancouver on its own.