Seems like a skill issue. All my friends are controller players and all have said AA feels almost identical. The reason why you're losing gun fights now is because of the removal of aim flinch. Now MNK players also get the benefit of being able to beam you while taking dmg like controllers have the last 21 seasons.
Also AA wasn't nerfed just because of MNK players, it was nerfed because even competent controller players have acknowledged it's too strong. Every streamer and pro player have all said it was OP.