I'm only ten years out of high school, but even then, one F-bomb per sentence was considered modest.

I'm sure your daughter wasn't psychologically impacted from hearing it 1,001 times in a week as opposed to the 999 she's used to at her school. I'd simply ignore it.

But yes, I agree, the older guy should have had the maturity and dignity to be more gentle. If, for no other reason, to respect you since you're within earshot of your daughter.