"The product is fully functional today, with the hardware design final, tooling complete, and manufacturing ready to ramp up in the next 30-60 days"
followed six-months later by:
"We want to update the hardware" and "is being updated to support DRM" amd the ship date being moved back to now.
A lot of people backed Matchstick because it was going to be open - the plans were all available for download, it was all ready to go, and we were going to have kit in our hands really quickly. Instead we were going to get something that was slowed down by six months so that it could have closed DRM-support added. And then it's cancelled because they added support for something that wasn't even part of the original campaign!
It's not surprising that the backers are upset.