From what I remember, My Dad... was like a family version of American Gladiators, and both were hastily-compiled filler material during the 2007-08 Writer's Strike, when NBC decided to fill the lineup with more primetime game shows. For we geeks, it was an awesome idea, but it was also NBC.
The show wasn't terrible, it just wasn't much to write home about. Wiki says one of the contestants suffered a heart attack during taping, but I can't find any further evidence to confirm that.
Like Travis said, there were plenty of other options from that same time frame that I'd put in place of My Dad... one short-lived flop does not a worst game show make.