Yes the OP stuffed up and yes, Qantas also stuffed up. Yet OP has to bear the full responsibility for the stuff up? Shared failure should mean shared responsibility. But alas this is no more the case. As you have seen all Qantas seems to hand out these days is one fingered salutes.
I can full understand why receiving a "booking confirmation" to the average traveller (i.e not frequent flyer nuts), is taken as "good to go", and most would not understand the difference between a confirmed booking and ticketed booking.
I wouldn't have focussed on the inconvenience on the ground and bad backs etc (which made your experience worse, but at the end of the day this is such a distraction and looks like you put it there just to elicit some sympathy for something that perhaps you might not deserve). Would have just concentrated on the failure of this booking to be ticketed correctly, and not being aware of this until departing - this is not the first case of an award booking to be ticketed incorrectly either, but many do pick this up before departure.
Including the events on the ground in Havana were for venting purposes only and won't be part of my argument with Qantas .