And this is why polygraphs are unreliable and a waste of time IMO. The same way polygraph tests aren't admissible in court, they shouldn't be required to obtain a job.

Just because somebody fails a polygraph doesn't mean somebody is lying. It could mean the presence of an anxiety disorder or somebody can simply feel nervous for having a bunch of hardware hooked up to them and a person asking a bunch of questions, not to mention, polygraphs can be fooled.

Maybe explain to them that you have anxiety issues? Don't state that you have a mental health disorder because that could cost you the job in most cases but simply state that you have anxiety issues and they might cut you some slack.