ALL polygraph tests are invalid. Not even admissible in court anymore. Anyone with even a little training can fool one. They’re a joke.
I’m sorry you feel that way. A polygraph test is only as good as the examiner administering the test. I gave hundreds of exams and trained many Law Enforcement examiners. I would not have worked years in a profession that I didn’t see produce the results of being able to verify deception and truth when utilized properly.