You still had Family Ties and Mr. Belvedere in the eighties, and even Roseanne, where John Goodman’s role portrayed a slob, not an idiot. Dads were still mostly okay up until the nineties.
Actually, in the early 1960s my brother and I were asking why dads were portrayed as stupid, there were exceptions but most dads were goofy, unlike the real men that we saw during the day.