Canada has never been under a dictatorship. We are a constitutional monarchy.
http://www.monarchist.org.uk/constitutional-monarchy.html
A dictatorship is an office that has been gotten through force, and a monarchy or crown is reign that is passed from one generation to another. A dictatorship is termed as a government ruled by one person or commander who is known as the dictator.
Also, we do not pay taxes to the monarchy with the exception of state visits.
The sovereign similarly only draws from Canadian funds for support in the performance of her duties when in Canada or acting as Queen of Canada abroad; Canadians do not pay any money to the Queen or any other member of the Royal Family, either towards personal income or to support royal residences outside of Canada.