What a loathsome couple of posts!
Jetstar is neither perfect nor alone in not being perfect. it is probably about as much of a standard deviation away from the desired mean as any airline. Some are pampered and sclerotic with a "born-to-rule" ethic, others way too gung-ho and do a professional job despite being run by amateurs. Some offer lots of jobs and faster promotion but at lower pay, some offer glacial paced career progression but at higher rates. Some look down their noses at others, some regard colleagues working for the same company as blinkered fools.All part of aviation's rich tapestry.
But they are all legitimate airlines offering jobs and to wish any of them ill is below the standards one should expect of true professionals. Maybe that tells us something. Never too late to change.