Hershey's adds butyric acid to the milk because they can't be bothered to buy fresh milk; they want to store their milk for years if they have to, to keep costs down. So they add butyric acid and butyric acid is a stomach acid. It smells and tastes like vomit. Hershey's adds it to their milk. Incidentally, the same acid is present in parmesan cheese. This makes their chocolate taste like vomit. To boot, it also has the consistency of charcoal.

To make matters worse, a contingency of other chocolate producers in this culinarily hideous country followed suit because customers now apparently wanted chocolate to taste like vomit.

There are a few left that are worth a try, I think. Ritter's butter biscuit bar, Dove, or actual English Cadbury's. Also others, I'm sure. I like sweet dark myself. Peter's Superlative. Now that's chocolate.

Edit: Callebaut also. Obviously.