Duram Durasheen poor quality

Bought a 5l white Duram Durasheen paint from Builders Express. I was promised it will only be neccesary for ONE coat.

The walls were washed and prepped before painting. It was really only for 2 walls. I had to paint at least 3 coats for it to look good. Now I need to go buy more paint to finish the last wall.

Really ****ty quality. Maybe costs less, but for the amount needed to paint, it will cost more than other paints.