After managing a guitar store for 11 years, I spent 20 years in third-party logistics (3PL). Based on that there are not enough words in English to describe the putridness that is UPS. They are by far the absolute worst of FedEx, USPS, DHL, and UPS. The difference is not that they screw up more than the others. It's that they absolutely NEVER take responsibility. Drove a truck over a box from Guild and the box didn't even get out of the first transfer point, nor did they tell Guild. It sat in the UPS facility for two weeks until Guild requested formal trace. And said it wasn't their fault as the Pilot Bass (inside a well constructed hard case) had "insufficient packaging". Fender sent is a bunch of instruments one day (about 25). The UPS drive put them on the lawn in front of the store about an hour or so before we opened. Had I not gone in early that day who knows what would have been stolen.
One of our 3PL customers, one of the major manufacturers of tractors, harvesters, etc. used UPS for small goods shipments to and from our packaging facility. We had multiple shipments destroyed by trucks driving over them. The box would come in with tire tracks on it, and UPS always, always said it was again "insufficient packaging". When one of the five contracted operations in our building complex moved to a new location, the customer sent a message to all the shipping companies (FedEx, DHL, UPS, USPS) that anything consigned to that customer at our address should be routed to a new address for consolidation and forwarding to their new location. FedEx, DHL, and USPS got it right. UPS decided that meant ANYTHING consigned to our complex (we had five suites and this change only affected one) was to be rerouted- our payroll (back in the day of paper checks) for two weeks was days late due to UPS rerouting. Ordered a book to be sent to my house. It never showed up, seller reshipped it. UPS said it had been delivered a week before. While I'm at home I hear a thump on the front porch, go out to see a UPS truck peeling out, and the package they claimed was delivered a week ago was in front of the door. And every time I went through the torture of calling the jackasses, it's never their fault, they can't do anything to resolve it, and I should stop calling.
Ordered a book for my wife, drive leaves the "we will redeliver tomorrow" sticker on the door. It doesn't show up. I call and am told our address is in an area where they don't make second attempts, but automatically route it to the UPS Store- except that will take three to four business days. I live a mile from the UPS depot and they knew where the package was, but they wouldn't/couldn't even allow me to go there and pick it up right away. I had to wait for tracking to show it available for PU at the UPS store... I hate and despise UPS.