My take?
The horror stories of AA are mostly from the archaic history of 4 different airlines merged in. TW/AA/US/AWA.    That’s a hot mess with many ticked off guys in the post 9/11 world, lost pensions, etc.     I get it, they had it tough. But if you’re starting at AA now especially at a young age, it’s gonna be a good career.
Yes, I’ve heard their scheduling rules can use an improvement, better min day (true min day), etc.   Not use old school MAC type computer programs, etc.
My big draws to AA:
*Great base variety (esp for the northeast, there’s 4 bases alone! BOS, NYC, PHL, DC).  2 of those bases for me are driving distance, the other 2 can be trains or planes.
*Most retirement movement the next 10 years.  Some years 900+ mandatory retirements per year.    8,300 gone in 10 years.  If you start now, you’d be 43% overall in just 10 years.   Let that sink in.    Also in years 11-20, more retirements of about 4,400.   So 12,600+ gone in 20 yrs.
Also AA has hired the least guys of the big 3, and of the newhires, MANY are the older types from Eagle flows and military.    If you’re below 35, you can probably retire #300-400 at AA.    Or top 100 if you’re in your 20s.
*Good business, IMO.   I think AA will weather any storm.   Certainly better than my west coast only legacy airline.