Here another theory why Stanley hates Charley:
Stanley's driven by the need to prove that he's special. His main argument is that he is an attuned wielder of an arkentool. Charley's existence proves that this is not an unique attribute. And that is something Stanley doesn't like. The fact that Charley is more or less accepted by the royals while the threat him like dirt probably doesn't help either.
On the Gowbin revolution, it's pretty certain that the sacking of Faq wasn't the special mission during the uprising. From Wanda's story we know that she contacted him not long after he found the arkentool. Thus he didn't have the time to win all those battles that persuaded Saline to make him heir. And if he already had won all these battles, Wanda didn't assume he would easily die in an attack on a weakly defended city.



