Go somewhere else dude.
He's been trying to do this for a YEAR.
Like you probably shouldn't be feeding your kids that much McDonald's if you require they remodel to suit your baby.
I'm all for these places providing adequate facilities but this is not the hill to die on.
Why not? Sure it's a convenience factor, but if you have it one for one sex, you should have it for all.
I do like how you focus on the fact it's fast food. Like that invalidates the concern