It’s got nothing to do with QF. I don’t know why you felt the need to mention them (or more likely, suggest my opinion isn’t valid because I don’t loathe QF the same as you. Having said that, I have not once ever flown QF to Europe. I’ve always used other airlines).
QR competes with many airlines, QF is just one, and really a minor competitor in the grand scheme of things. SQ, like EK, is a major competitor to their business model. People said EY would coexist with QR as VA partners but now they’re as good as gone.
I don’t know what a QR sale has to do with anything.