Tho he is incompetent it probably comes from his mum trying to take control of it all and ...

Tho he is incompetent it probably comes from his mum trying to take control of it all and keep him dumb so he relies on her.
If she didn't want the crown or atleast wanted to help the country at the moment, couldn't she teach/advise him...or kill the mum

Don't think he would be that sad if the little creeper thought this meant he could get closer to her