not worth a fig
Unimportant; insignificant. I know you're upset that the decor wasn't exactly as you designed it, but that's not worth a fig when you consider how spectacular the gala was overall.
not give (or care) a fig
not have the slightest concern about. Fig was formerly used in a variety of expressions to signify something regarded as valueless or contemptible.
fig, not care/give/worth a
See not care/give a fig.