I've encountered this quite often , platter of oysters - one of two that are completely mangled up due to poor shucking technique. Another phenomenon is super super tiny specks of kumamoto or kusshi oysters. These varieties are generally small to begin with, some that I've been served are just insultingly tiny. I've always sucked it up and quietly downed it.
Given how much restaurants are charging these days $2-$3/piece (that's 1 big mac or a 6in cold cut combo!), has anyone requested replacement oyster(s) and what is the waiter's reaction?