All those problems you mention are real, but they're not the main problem. The real problem with the TSA is that it's explicitly unconstitutional, since the 4th amendment
explicitly prohibits search and seizure without a warrant.
"The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."
This does not at all describe the operation of the TSA's search and seizure. Notably, the statute's language makes no allowance for implicit consent based on location or attempting to use some private transportation system. A sensible compromise is to privatize airline security, since the constitution does not prohibit Delta employees from searching and seizing without a warrant.
"The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."
This does not at all describe the operation of the TSA's search and seizure. Notably, the statute's language makes no allowance for implicit consent based on location or attempting to use some private transportation system. A sensible compromise is to privatize airline security, since the constitution does not prohibit Delta employees from searching and seizing without a warrant.