The Dragons' Den star claimed that Sugar should have fired McQueen after discovering he had lied on his CV.
Businessman Duncan also said that he was not surprised to learn that Lee had missed his first day of work due to illness.
"That's what happens when you employ a liar," Bannatyne is quoted by The Mirror as saying. "I'm so angry that Alan Sugar sent that message out to the country. If you want a job, kids, lie on your CV. I'm disgusted."
McQueen's resume stated that he had attended Thames Valley University for two years when he had only been there for four months. Despite his dishonesty, he went on to beat Claire Young in the final episode.
Bannatyne added: "Claire should have won. She's absolutely fantastic."