* He failed to find a passage to Asia. Cartier's main goal was to find a route to Asia, but he was never able to find one. He explored the St. Lawrence River and the Gulf of St. Lawrence, but he never made it to Asia.
* He failed to establish a permanent settlement in Canada. Cartier attempted to establish a settlement at Charlesbourg-Royal in 1541, but the settlement was abandoned after a few years. Cartier's settlement was not successful because it was too small, it was not well-supplied, and it was not protected from attack.
* He was often harsh and ruthless in his dealings with the indigenous peoples of Canada. Cartier kidnapped several indigenous people and took them back to France. He also attacked and killed many indigenous people. Cartier's actions contributed to the tense relations between the French and the indigenous peoples of Canada.
Despite his failures, Jacques Cartier is still considered to be one of the most important explorers of Canada. He was the first European to explore the St. Lawrence River and the Gulf of St. Lawrence, and he helped to open up Canada to European exploration and settlement.