How is he lacking? Look at your pay stub. Do you require any other evidence? It won't be long before you make LESS than a Spirit Air Pilot makes.
How many Grievances are pending?? Isn't it over 500?
Going back to the DUI. How about embarrassing EVERY single employee with your conduct, that would seem to show a blatant disregard for employees by the CEO!
As for US's attitude towards customers my opinions are well documented both here and elsewhere on the Internet so I'm not inclined to repeat myself.
Doug Parker is a great CFO and just a mediocre CEO. Honestly if I ever by magic was the CEO of a major airline I'd hire the guy in a heartbeat because with him I'd know the money was being taken care of. Having a guy like him as my 2nd in command would free me up to do the moral rebuilding, create the vision and lead and inspire the employees to do great things.
Customer Service is not a cost center per se, great customer service comes from involved, engaged and empowered employee. You take care of the customer and you're ahead of the game. The mark of a good company is how it treats it's customers day in day out. The mark of a Great company is how they respond when things go wrong and that's where US consistently drops the ball.