Between the lousy pay and the lousy working conditions, not to mention a parade of scared and/or hostile people, not sure what else to expect. I've only flown a few times when the lines didn't stretch out for continuous screenings. It must be a grind.
I worked with the public, but not on that scale! We would have been fired.
I was able to observe a small, isolated, sort of "rural" airport when TSA came in, and happened to know some of them. (Small town with no road system for "out-of-towners" to be hired.) It was deemed an Emergency, and was. Really. One person hired had been caught and fired for lying to the Feds (and forgery)from a job requiring oversight by the Feds - and then the Feds hired that person back!
Since then, near as I can see, there are now some standards. Not very good standards, and not good enough training, but some standards.
None of that excuses what's going on, but consider the source. We vote for the people who fund, and are in charge at, TSA.
When one major airport that was at the change-over between old scanners and new, but hadn't gotten them, the TSA agents I met were actually apologetic about the need to do pat-downs.
I just try not to grit my teeth and be polite - and do my due diligence when I vote.
Be safe - which has so many multiple meanings, today.