I was surprisingly impressed because I don't like him either. That said, what he's said in his interview doesn't correspond with his determination to play in Aus.
His stance together with his parents insistence that he was being badly treated in terms of his accommodation, has IMO caused further damage to an already less than favourable public opinion of him.
His claim that he tested positive on December 16th, and didn't find out the result until the following day, so explaining his attendance at an awards ceremony is questionable.
He's extremely wealthy and no matter where he plays can afford to rent accommodation, complete with tennis courts to enable him to self isolate for a country's stipulated length of time, before any tournament.
Why doesn't he just do that in future if that's what's required?
I find it hard to believe that such a competitive and talented sportsman, would effectively ban himself from international competition when other options are available.