We cancelled our AAdvantage are about 5 years ago after 24 years, with the hassle of booking with FF being only one of the reasons we did so.
We used up all of our remaining FF miles with AA and don't plan on accumulating or using them any more. When asked what FF program we want miles credited to e.g. hotels or car services, I put down my JB number. We used to fly AA all the time. Now I try to avoid them if I can.