Your experience is not unique. One slip of the tongue or formal complaint about the asinine performance of this obnoxious agency and you will be detained for days in some cases. There used to be a website called Homeland Stupidity that documented the “We can do anything since we are Feds” attitude prevalent since 911, and they put the creater on the no-fly list and all hell broke loose in other matters for him.
These agencies practice revenge, and sometimes they steal, since they know you will get nowhere in their Kangaroo Investigations. You should forward your complaint to the GAO (government accounting office) and if they get enough of them, they may produce a sting operation like they have in the past. In response to complaints of screeners not looking at the luggage x-ray monitors, the GAO found in dozens of security check-point “audits” (stings) that most weapons they hid in luggage were not found by airport security for years. I’m not sure about after this latest agency was created.
TSA, despite being a government agency, has done a fairly good job at preventing hi-jackings (with the exception of the full-body x-ray scanner scam, which couldn’t see inserted weapons and caused cancer in the past.) The problem is that they have made life a living hell for the paying passenger, running the airport like a prison, and killing off tourism to the USA. No one treated like you were will ever come back if they don’t have to. We need to send them all to charm school, or just start over with private security owned by the airlines again.