At the end, they all sold the same junk sourced from the same places, but with different labels sewn into them. Consumers saw no value in paying a lot extra for something they could get for a lot less somewhere else. Thus, department stores outside of big cities vanished.
The same thing happened to malls. They used to be full of locally owned businesses that offered a variety of goods. Now, they are all the same handful of stores selling the same things you can get for a lot less online. Even worse, nearly all of them offer a low rent experience because there are only a handful of stores left operating in each one. Seeing a building full of dark and closed stores screams economic decay. Who wants that experience?