We have UPS headaches almost daily. Our local UPS hub has been mismanaged for years. Now with Covid, they have something to blame all their issues on which they are fully taking advantage of. They put our packages on 3-4 different routes depending on who knows what. Sometimes we get deliveries at 10:00am, which has been the norm for 20 years!, and sometimes we get packages at 7pm at night. It has made last minute jobs hard to deal with because we just don't know when to expect our packages. I've always made friends with the UPS drivers and they all tell me how UPS has turned into a crummy company to work for. The old timers had it really well but the new batch aren't treated or paid the way they used to be.
Then we have FEDEX which sometimes just decides they aren't going to deliver to us on when it isn't convenient for them.