After a friend recommended a caterer for my upcoming wedding, I looked them up on Yelp to find they had had just a few reviews and a one-star one was dragging their average down... one star because "their truck was driving too slow on the Parkway today."

FWIW that is a 25-mph zone...

As for the picky/never satisfied guests, for some folks it's just part of the routine with them. My sister, bless her, is incapable of ordering anything the way it comes on the menu and never has been, even when we were kids and our mom would take us to Roy Rogers. I think subconciously my sister scans a menu looking for the item that is most fun to deconstruct. I just about strangled her once when the waitress painstakingly took her order for half the ingredients on the side and toted out all these wee ramekins of olives and tomatoes and what-not, then my sister cheerfully dumped each one back into the salad bowl where the ingredients would have been anyway, had she not gone plucking around with the menu. Needless to say, the list of places where we will go dine together keeps getting smaller. Although Korean BBQ works great for her, as she gets the 10 little ramekins of sides/relishes to play with whilst the bulgogi cooks on the tabletop grill.