Steve, I empathise with you in declaring AA a ‘no go zone’.
Your reason may be over lounge access.
Over a number of years, I have seen the quality of service decline on AA Premier cabins to such an extent that I consider their domestic ‘premier’ cabin a ‘full service economy cabin’ of yester year. I dread to think what their current Y cabin must be like.
It is on this basis that I am shocked at BA’s link with AA. I fear BA is heading in the same downward spiral. What a pity ! BA had a product & service which could have made it a world leader.
Alas, BA is in the process of losing its edge.