hmm...
The Word: Geschmackskompromissreue
Pronunciation: Geh-shmack-skohm-pro-miss-roy-uh
Literal Translation: "Taste-compromise-remorse."
If that one feels too clunky, you might enjoy these existing concepts:
Verschlimmbesserung: When you try to make something better (by trying a "new and improved" flavor) but actually make the situation worse.
Kulinarikernüchterung: "Culinary disillusionment." The moment the flavor hits your tongue & you realize marketing was better than chip.