I worked for American in the late 90's to early 00's. Actually got laid off the day after 9/11. I'm a physician and it was the only big corporate job I've ever had and was quite an eye opener. The most toxic work environment I've ever seen. Everyone hated everyone.
The pilots hated the flight attendants. The attendants hated the pilots.The ramp workers hated the mechanics. Baggage handlers hated the cabin crew, etc, etc. And the ticket agents, who weren't unionized and paid lower, hated all who were union. Finally management was Draconian and demeaned every employee.
I've been self-employed since then but still have many AA pilots and attendants see me. Up until 5 years ago all I heard was dissent and discord. This is what I always experienced on an AA flight. The flight attendants were curt and pilots distant and aloof.
Well in the past 2 or 3 years there has been a change. The old battle axe attendants are fewer and giving way to younger, pleasant, smiling, genuinely helpful people. The pilots sound like a trusted friend. Travel on AA isn't like having an unprepped Barium enema anymore.
Is it perfect. No. Better, yes.