Only restaurant my family had a borderline hostile reaction from the staff. Seated other families before us, stating "we forgot you," and ignoring a meal order from a member stating, "you didn't order anything."
Its 2003 and I am watching the Matrix Reloaded; the Merovingian has spiked the code of a cake he's directed to be served to a patron at his restaurant. The special cake causes the woman to have an orgasm within seconds of ingesting the first bite of it...
It really depends a lot on management. The one I work at takes customer service deadly serious, and we bend over backwards in the name of being accommodating. Had what you described happened at my OG you would have had your entire meal comped and probably gotten a gift certificate along with a profuse apology from the person in charge.
I kind of feel bad for you. I’ve never been to a “bad” Olive Garden. Sure it’s not fresh home cooked but it’s still good imo. That said I only eat the carbonara or the eggplant parm with gnocchi soup. Don’t think I’ve ever eaten anything else there.
It's possible then you've never been to a "good" one. While they were never great food, back in the 90s early 00s they were all a higher quality than what you find now.