Forward Press
Hall of Famer
I could be wrong but didn't McGowan's potshotting of other states start (or at least ramp up) when NSW issued every other state with a bill for their hotel quarantine whilst claiming they were saving the country by themselves
WA had harder borders before the other states, you are indeed correct in that NSW liked to whine about it first. The Ruby Princess fiasco caused rebukes and consternation from WA, Queensland and Victoria (guess what they have in common), and then it just moved on from there.
Still doesn't really excuse the at-times embarrassing tit-for-tat shown by Premiers and the PM that depended on their political affiilation - and yes, McGowan did no favours by fanning it to help win an election.