People really do be bitching at Seto for being how he is but don't ever bitch about Anjou literally not being able to take anything seriously. She genuinely can't even talk about herself without pulling off a joke or pulling off sexual jokes to do stuff with Seto.
That's what makes this pairing so interesting. A booksmart kid who likes studying but has no clue about girls or what he wants to do with his life, with a gyaru who can't take anything seriously, but also can't grasp what she wants to do with her life. It's a dichotomy but they have a lot more in common than they realize.
Point is, stop bitching about Seto. Poor kid has never had to deal with ANY of this in his life. He's being pulled along by someone who's just living day by day, and he's trying his best to keep up.