Honestly I reckon she’s just not at all that bright. Of itself not a terrible thing because plenty of people who aren’t the world’s cleverest do really well because they’re not lazy and self-absorbed with it. And they apply themselves diligently to working hard, are well adjusted, normal adults who know how to interact with others, are able to deal with constructive criticism and setbacks, be good role models for their kids, and be a useful, engaged participants etc.
Charl is just a lazy, self-absorbed thick twit.