She said it's hard because being "black, female, hardware founder (without previous experience in hardware), and soon after starting Tinsel… a baby. " - where customer relationships are critical and she is part of an under-represented group, I can certainly see how being black and female (on top of being a new mother!) adds to the challenge.
However I didn't read anywhere that she was making this reason the startup failed: perhaps you could quote for me where that was explicit? My take was, hardware is hard and expensive. She says "when we look at brass tacks, it comes down to money in and money out."
Btw, Aniyia - if you're reading this I'm furious I didn't hear about Tinsel until now! I have a strong desire for a gold Tinsel, it made an immediate impression on me. Is there any chance of one lying around still, available for sale?