As a 5 yr premium pax with GF I strongly second your entry.
I can say GF is no where near as bad as some airlines I've traveled with though. They can however take more pride in presentation. Quick turnarounds shouldn't come at the cost of a dirty cabin.
QR has employed "specialist cleaners" to make sure ac are cleaned to a pristine standard for EVERY flight. I have also been made aware that crew are reprimanded at the end of a flight if toilets are dirty after inspection by ground crew.
AD take note!
Oddy