i dont fully understand gw2's story (due to English is not my first language). but i dont think balthazar is that bad. i mean he try to claim the power of Primordus and kill Kralkatorrik. why players need to stop him? if he do success this is no ls4 story. and even dont have to deal with primordus and jormag.
Human god is supposed to rivaling with the elder dragon. he is the only one had the guts. what's the other 5 doing? no army at all and left player do all the dirty work? left the world like a coward. not even Grenth and melandru can control Zhaitan and Mordremoth's army after they had been defeated/ killed.