I don't quite understand why you should be annoyed: this was a targeted offer and you were not targeted, so I can't see why you should be annoyed. And frankly. is lounge access for one flight really something to get that worked up about? surely you have not booked that flight just for lounge access, have you?
Be that as it may, the advice given by others is best: go for the Dublin match. It will also be much quicker than the *A match.