They're just people doing a job that I regret is necessary...
I think this is the difference, many people believe that the TSA are not necessary nor effective.
9/11 (which was the fuel to create the TSA) happened because at that time the expected response when you (as the passenger) plane was hijacked, was to stay calm and sit and wait for the plane to land, while random demands/negotiations were made with local governments. Yes, a few people might be killed as an "example" or threat, but if you wanted patiently your government would save you.
9/11 shattered that illusion/"rules of engagement". Now, all of the sudden, if your plane is hijacked you'll find yourself as an unwilling participant in someone's suicide run and your only way to survive will be to fight as though your life depends on it (because it does).
I this respect, the complacency of 9/11 will never happen again regardless if the TSA exists or not.