He is portrayed as a doofus too engrossed in sports to care about the busted car, and he assumes she knows nothing about cars, so he makes up terms.
She gets revenge by pulling the TV cord and calling the cord the “wingnut redirector”.
I don’t really see it, to be honest. I imagine that if it was on my TV endlessly, she would come across as a nagging wife, but it doesn’t really bother me. In contrast to the sausage ad, she does something about it, she doesn’t just take his childish nonsense.
And no, portraying men as childish or immature is not sexist by itself - oh he’s insulted for five minutes, but society still treats him as a grown-ass adult, while she’s a killjoy who is too irresponsible to keep her job, not that she needs it because she is married.