It would seem Karen does have a grudge against Luann, since she writes her (or helps write her) as an arrested development, asexual lump the majority of the time. But then again, Candace Bergen hated Charlie McCarthy, too.
“Good for you, Luann. I’m sick of the “clean your room” demands, and so is Luann. She has more important things to do.” Like grow up and not have your dad tell you to clean your room like you’re 13. Welcome to Arrested Development Junction
this guy’s dialog is like watching paint dry.