Anything will break if you abuse it enough. Seems like UPS has a reputation of abusing it enough! Good suggestion above about taking them to court. I don't use UPS at all any more. They are expensive, their service sucks, and they are not very helpful if you have a question.
Besides that, if you are shipping a gun, they require their premium overnight service. They went to that because THEIR EMPLOYEES were pilfering the packages. What a concept!
If you're in a hurry, USPS offers Priority Mail, which usually gets anywhere in the lower 48 in two days.