If Canada wanted to be serious about startups it could make trivial changes to enable it. However it's committed to becoming a dutch diseased resource colony with no value add and a macquiladora for US software companies. Relative to capital and assets, it's the least productive place on earth. The whole thing runs on riding the coattails of like 5 undergrad profs at waterloo, and a certain bank everyone knows launders cartel money and facilitates capital flight out of China.
Judging by its impact, YC is one of the greatest companies of all time. Canada isn't in that game imo.