"an outsized sum was spent on professional services (legal, branding, design, etc…)."
You can get good branding and design for cheap if you know where to look. The only real (large) necessary expense I see here is legal services to draft up contracts and agreements for co-owning art. Why couldn't they make a deal to pay the lawyers after they raised their next round? Don't startups do this a lot?
It seems as if their quick demise could have been avoided (or at least delayed) if they had kept their burn rate lower and focused more on sales instead of marketing. In the end your sales numbers determine whether you live or die.