Because general sentiment on her was positive then. The downplaying now basically comes from "I don't like her now, therefore past her can't have been anything notable, because past me can't have been wrong".
It's been years and Coco is still sitting at the third most supad of all time, beaten only by Pekora and Rushia. That's not a stat for someone who actually was never a big deal at all and never achieved anything for the industry.