Ok first off, why the fuck does he have an oversized head and no one else does? Also, is this asshole really inserting himself in American historical events?
In defense of Mai, she is poorly written. The most interesting things about her are the consistency of her apathy and the fact that somehow her childish crush on Zuko morphed into a sense of entitlement. Even her backstory is contradictory. Were her parents strict and demanding or weak and confused? Therefore anyone who attempts to interpret the series seriously must do something to retcon Mai, if only to tone down her "sullen, bored teenager" act (eg, TomTom).