As time passes, people's memories naturally become distorted by the progression of time and changing circumstances.
This is normal.
For instance, when we were children, we used to think our classrooms were expansive, the village was vast, and the distance from our village to the town seemed incredibly long. However, when we grow up, we realize that the classroom in our village primary school was actually cramped and narrow. The village was not as big as we remembered, and the journey from the village to town was just a 20-mile drive, which flies by when you're driving.
Similarly, the way we remembered a dish as incredibly delicious during childhood might not withstand the test of time. When we grow up, start working, and start earning money, we might revisit that dish from our memory at the same restaurant, even prepared by the same chef, only to find the taste different from what we remembered.
We always think it doesn't taste as good as before.