Probably overcooked, which ruins them.
My favorite way to eat them is raw, but since being diagnosed with an auto immune disease, I order them steamed or Rockefeller. They are still my favorite food in any manner served.
In Daddy’s last year, I was the only child who lived near him. I would do his shopping as Mother had died a couple of years earlier.
He would commonly have me get him a pint of oysters around twice a week. He would have steak just about every day. He would only eat a small part of the steak and the dog would get the rest.
He could afford it but it was still wasteful so I eventually bought only rib eyes and had the butcher cut them into two pieces. He still did not eat the whole thing.
Just curious, why does an autoimmune disease keep you from eating them raw?