I'm really not a big fan of TSA, but in this case I'd like to know just what you would have wanted them to do.
Nowhere does it say that they were impolite or rude, only that they were unable to resolve a security issue.
Yes, of course I understand that the situation was certainly embarrassing, but the question is not whether she was old or sick, but whether she could have posed a security risk. Not for me to decide. Nor do I know whether all the facts are known.
If yes, she had to be checked. Simple really. In this particular case I tend to agree with TSA. There are others where I definetely don't. The baby milk incident a few months back for instance.
Now, feel free to bash away.