If a company says "we're going to photograph the coloured shells. They were out for shipping by Royal Mail today, but were sent back to the depot. We're paying extra to have them delivered Saturday, and will post photo's ASAP", and almost a year later hasn't done so, how is that the backers fault?
If a company says "We're on track to deliver by the 12th of May", 7 months after saying "we'll have them out for October", and hasn't done so, how is that the backers fault?
If a company can't show a single image of a working machine, 2 years after a working prototype was ready to go into production, how is that the backers fault?
The actions of RCL over the past 2 years have been a complete embarrassment, ranging from pulling (one of) the release date(s) to redesign the hardware after a bunch of kids discovered a button problem just before launch, through to being asked for the dimensions of the unit, and when one backer produced an image with their best guess based just on the size of the USB port, RCL told them they were exactly right (and by the way, could they borrow that image for their own use?)
Other than several renderings of the final product, RCL have shown noting beyond the original prototype, some 3D printed offerings of questionable quality, and a bag of buttons (not even chocolate ones).