I get treated shabbily I take my business elsewhere, sixteen months ago copped a surly Qantas FA and haven't been back. Maybe she was having a bad day, copped her at the wrong time, maybe at other times she is a delight.
I now travel Virgin, if they stuff up, I may come back. They don't look like doing that so far. You can rabbit on all you like about pay, skills and qualifications, if people have a bad experience they will move their business elsewhere.
In most occupations you have to put up with stress you consider you don't deserve, be it from lazy co-workers, inept management,officious bureaucrats or demanding customers. Sometimes to others you are one of these. Build a bridge, get over it, and be nice.
Qantas can either ignore this, deny it or fix it. I don't think they are the worst, but I'll fly on the best I can afford, and at the moment it isn't Qantas.