Why does everyone seem to hate Ubisoft?

Ubisoft, the game company that makes the Far Cry and the Assassin's Creed games seems to be a very hated company but the games they make are right up my ally. They all are open world games taking place in exotic locations and historical settings. In Ubisoft games you can free roam through Nepal, Stone Age Europe, Ancient Egypt, Ancient Greece, Anglo-Saxon England during the Viking Age, the Caribbean during the Golden Age of Piracy, Renaissance Italy, the Colonial American Northeast, the Holy Land during the crusades, and a bunch of other settings. As someone interested in history and foreign countries and who likes exploration in games I don't see what's to hate here.