Yh going on all in the flop is not good, we isolate ourselves purely against the tip top of his range, we have the best draw, and not far off the best possible bluff-catcher.
As played our relative hand strength barely alters from turn to river giveen that Q4 is so unlikely, we do however now beat A4, but given the action its optimistic to think he plays A4 like this every time (although certainly possible on the .fr sites) I think he's extremely likely to be slowing down by the river with A4, so actually the fact we river 2p doesn't make a huge amount of difference when he's repping AQ+, and we CAN have AQ in our range for defo.
In terms of the theoretical we don't need to bluff-catch all that often vs such a large bet, we actually have the second nut bluff catcher (AQ being #1 by this point) I think we'll have AQ just infrequently enough to need to call off A7 here once in a while (would have to be
specifically) so in theory we should prolly call whenever we have
or any combo of AQ.
Having said this though in a vacuum without solid reads its a clear fold because people in MTT's are just SO SO SO value heavy when they do this. 44 seems likely to have been his holding, a well played hand imo Mr. Goulder