Inadequate signage of taxiways
Sorry to intervene. Agree with this one 100%. If you're supposed to rely on a blocky crappy graphic in the ERSA with the ground frequency controllers rapid directions that are difficult to follow, then there's no hope for you.
I responded with "unfamiliar with Bankstown." I got back something like "you are at least going to need to know where taxiway Juliet is."