I know what you mean. I worked in the optical business for over 30 years.
I may not have experience running my own company. But I have years of experience in manufacturing and QC and I think they really need to step up QC. IMO the two with the back ends that won't come off should have never...
There is a thread on reddit where someone had the same issues as @HillaryClinton. The backend wouldn't come off and arrived with scratches and blemishes. Seems like they may have one bad apple that can't get the assembly right.
I don't know the inner workings of HL, but IMHO, I would think...