I'll also reiterate what I said last night: if this team has an attitude problem, it's a quite different one to the ones Australian teams had in the past. The Waugh-Ponting-Clarke sides used hostility and nastiness as part of their broader cricketing strategy to intimidate the opposition psychologically and make Australia frankly unpleasant to play against, in much the same way as, say, a Jose Mourinho coached football team might use hostility and nastiness as part of their overall gamestyle.
Nastiness is most definitely not part of this team's overall game style. It's not like we saw any of this during the first four Tests in the 2019 Ashes, or last summer, which are the high water marks of this team. When they play well, they don't play "unpleasant" cricket in the sense of sledging, mouthing off, exploiting loopholes in the rules etc etc.
It's a sign that things are going very wrong, not something they're trying to actively employ. It shouldn't be bracketed in with the former teams' "nastiness".