Bewitched was always on after Gilligan’s Island when I was a kid (either on channel 17 or 29, I can’t remember which). I usually watched it, but when the show came on it always left me depressed because it always punctuated that afternoon cartoons were over for the day.
When I was a kid, we were lucky to get either channel 2, 7, or 9 (ABC, CBS, and NBC).
It was rare that more than 2 at a time could be watched, and never got a clear picture (always “snowy”).