I think Arthur has a strong case for retiring Urthur on the grounds on dementia. I know Urthur was under a very strong Troll magic spell for the last two weeks, but many of his decisions recently, even before that, have been so obviously wrong that it really makes you wonder about his mental state. The normal, average, common folk of Camelot; the people he would have taxed or be flogged, they don't know he was under a magic spell, so there is a huge loss of confidence there (and isn't magic outlawed - is this guy really a King? Or, if he outlaws magic, why does it continue every week?) The people respect Arthur, but Urthur needs to get out more if he isn't going to have an uprising.