Has anybody had a bad experience with UA, United Airlines?

I just flew for two days to Singapore and man what an experience that was. The service sucks, the food was terrible and there is no way to choose what film I want to watch. Even the flight attendant said: “if you have any complaints just call this number 1–800….” I wonder how is it possible for UA to still be in business. My response to her was: ” my best complaint is not to use your airline again”