It’s a lot more strategically complex than that. Fo example, America manages the majority of its signals intelligence for a large chunk of the Asian content through various faculties such as pine gap [1].
You’d be foolish to postulate that geopolitically charged agendas are driven by a simple explanation such as “a superiority complex”.
Of course the US are powerful, and in fact pretty much control Australia, which is indeed a small country. Australia is getting a bit ahead of itself if they think they are a match for China. I think Australia would be foolish to believe that being best bud with the playground's biggest bully means that they can freely do as they please and that it is useless for them to remain civil to others.
Your statement is contradictory - on one hand you agree that the US values Australia therefore justifying their decision for this agreement, and on the other you say Australia is independently matching itself to China - it’s not appropriate or correct to selectively choose parts of either statement because they are are in fact mutually exclusive relative to your argument.
Either Australia is a puppet of the US and therefore by postering towards China it is not an AU vs CN issues but instead a US vs CN (via AU) issue or somehow Australia has managed to convince US to give them top secret technology and have independently decided to tackle CN.
Over to you - which is it?
Australia is a puppet of the US and at the same time is having a "complex of superiority" (which permeates the West as a whole, to be fair), because who are those 'Chinamen', anyway? Nothing contradictory, there are several aspects at play, but I am foolish as you say.
Considering the history of Australia the hypocrisy is grotesque, and this just shows that the bad old habits die hard.