Watching the very slow, painful downward spiral of AA under PMUS leadership is quite unfortunate, but not surprising. Parker, et al took US and flew it into the ground when they merged it with HP. Today, AA is a tale of two airlines. By and large, their TATL and TPAC premium product is goof and competitive with DL and UA. The domestic product is a hot mess and their customer services (sans the EXP desk which is lovely) is absolutely in the toilet. Actually, that's kind of insulting to the toilet.
DL is on their game. US is slowly getting their mojo back and B6 is picking up steam. Funny thing is that when Parker looks in his rear-view mirror he can;t see his competition. He thinks he's way out front but the reality it they've long ago passed him.