I think that kind of marketing would have made a big difference.
Some people do want to design their own clothes. But they'll probably be making their own clothes by hand already. Everyone else wants low cost, a strong brand, and/or a celebrity link.
So mistake one was assuming that just because you're a build-it-yourself person, everyone else is too.
But more, marketing for these kinds of projects has to be creative. You have to invent your customer relationships and your brand, not just try to buy them wholesale using social media and Google as a retail store for clicks.
If this was easy, everyone would do it. But it's not easy at all. It's really, really hard.