The biggest problem Camelot has is the lead Actor Jamie Bower, he looks like a feminine underwear model, he has no muscle tone at all and looks like a complete wimp. The only reason I can see casting him is to attract girls who are 14-17 (due to his roles in Potter and Twilight), the problem is, this is not a show for that age group.
Jame Bower brings no charisma or charm to the character Arthur, I find myself rooting for Morgana then I do Arthur. Mr. Bower has such a feminine look to him you can't even tell him apart from Guenevere when they do there sex scene.
He was a major miscast for the role. If the producers wanted to show Arthur as a spoiled self-centered 16 year old then they should of gotten an appropriate actor. The script for Arthur is definitely written for a 16 year old so I'm not sure why they would get someone who doesn't even look the right age, so basically you have someone who looks like there in there 20's but acts like someone who is 16. It all comes off as very annoying.
Other issues the show has is sloppy writing, they don't setup a foundation for the new lore and there scripts are kind of all over the place story wise, they leave a lot of plot holes that never get explained and it seems there trying to cram to much into each episode.
The show would probably be a hit on the CW Network for a much younger audience (remove the nudity), but with Spartacus and Game of Thrones setting the bar very high for premium cable shows, Camelot falls short.