hi Rachel10!
well done on getting out of there with your dignity/temper intact - it sounds like you are perfectly well in control of your parenting to me! all we really have at the end of the day is our own reactions - adults and children alike.
you are responding calmly and appropriately to her big feelings - removing her from situations that are too much, and staying neutral with other parents. as you say, you've been down this road before - and honestly, the judgment of others says more about them than it does about you!