Canadian here, very happy with the milk quota system. Despite all the media hoopla, I don't actually know anyone who cares about it. And I live in a city.
Also a Canadian. Likely most people don't care about it because they don't really know about it, and the additional price that goes to subsidizing farmers is also not material for many people. Also, many who live near the border make a bi-monthly trek into the US (pre-covid) to buy milk, eggs, and gasoline.