Reid, 59, served as a judge of the hit reality television show for two seasons, according to The Hollywood Reporter.
Speaking at a panel discussion at the annual music industry conference Midem in Cannes, Reid said "It's the worst thing I've ever done.
"The first season, yes, I had a great time.But the second season I was fully engaged trying run a label, and it wasn't fun anymore," he said.
"More importantly, it really affected my taste-it almost destroyed it," he added.