I've just hit 2 million miles last week.

All of this is true, and no matter how much you do it, it's still all true.

I can't even keep track of what I'm supposed to do at my own home airport that I've been to thousands of times. Some people know me on a first name basis there, and still act judgmental when something was (seemingly randomly) changed and I don't know about it.

TSA is by far the worst in the USA though. Their expectation that you do exactly what you should, without telling you what to do, while constantly changing the rules, is infuriating. Often there'll be 2-3 lines and DESPITE HAVING THE SAME SCANNERS, they'll have different unspoken rules that you are literally yelled at over.

My theory is that it's intentional; change the rules for security personnel so they don't end up in a routine, change them for travelers so... they also don't end up in a routine. If travelers with malicious intent are stressed because of the lack of predictability, they'll be extra stressed when they're up to no good.

Of course, this is baby/bathwater territory as only a fraction of a percentage of people are up to no good, and of those only a percentage is a danger to others.

i made this point earlier but in a TSA line do you not just watch the people in front of you and do what they're required to do? That works pretty well for me.