Do you think the annoyance arises because there actually is a “correct dragon” in the eyes of Cardiff City fans?
For example, the dragon of Wales? The dragon which has previously been on the badge, is flown from flags within the stadium, and is representative of the country Cardiff is the capital city of.
If we changed the badge to a bluebird standing up, like Bristol City or Norwich’s badges, would you be equally confused if people complained it wasn’t the “correct bluebird”?