Did they get her there? Then they provided the service they implied. Yes it is her fault for not planning ahead and allowing for unforseen circumstances. If her flight would've gotten cancelled due to a mechanical failure (which is far more likely to happen) , then she would still be upset and late for her poorly planned "dream vacation".
In short, could it be better? Sure it can always be better, unless you have a 100% satisfaction success rate (which is unattainable, you will always have unsatisfied customers no matter what).