Compared to the USA, Canada spends a smaller fraction of GDP on healthcare, covers 100%, and to the best of my knowledge provides better care overall. That doesn't look like failure to me.

However long-term trends in both countries have the cost of healthcare going up faster than inflation. That cannot be sustained indefinitely in either country.

At some point, something has to break. Healthcare cannot grow faster than inflation forever. (Neither can the cost of a university education, nor can the size of government.) But the fact that some politicans are considering privatizing pieces of the system to make government budgets easier to balance doesn't mean that public healthcare has not been a success.

Cheers,
Ben