Minimal (outside of the fact that a lot of the money given to Bombardier resulted in equity for Quebec and wasn't just handouts; but in terms of % of the whole program it's a wash).
Yet Canada isn't out there banning Boeing planes or asking for 300% tariffs on them for "unfair competition".
And I'm not sure you want to get into a discussion about China and protectionism, to say nothing of national security concerns.