When Austin went in the house he was quick tempered and did have several goes at Farrah, but there is no question that as time has gone on and maybe he has become more sure of himself his behaviour has gradually got worse and worse, his outbursts becoming more frequent and the vitriol with which he spits out his tirades have become more and more unacceptable. This is only what we have seen, but going by the other HM's his outbursts seem to be constant.
James has tried to worn him on several occassions but he took no notice, James had had enough and so he nomminated him, it remains to be seen if they will continue the so called friendship once they are out of the house. It is only then they will truely get to know each other, warts and all.