Worthless items
Celery tops my list. It's good in, say, chicken salad, but purely for the crunch. Much appreciated. Otherwise it sucks and only comes in annoyingly giant heads which turn to spaghetti in the fridge.
dried herbs also suck. Flavored oils bother me. So do most silicone molds and general rubber kitchen stuff. And...

sorry...forgot stuffing...it's good in there.