Unfortunately companies like United have created cultures where people take pride in doing their job poorly. And the continued long term customer hostility companies take shows no sign of letting up. My suggestion is to take Southwest or Jet Blue (or Singapore Airlines or Cathay Pacific).
Unfortunately sometimes you need to travel somewhere that no airline that cares about customer service flies. Then just hope somehow the broken system you must trust to get you someplace somehow doesn’t fail you too badly. Or you can follow the increasingly common trend and publicize the horrible service you were subjected to, in your blog or perhaps your own webcast.