Gavin Newsom says he's done fighting for a chance to go toe-to-toe with Joe Rogan on issues ... dismissing JR as popular, but outdated, AKA "the Facebook of podcasting."

The California governor sat down Monday night with journalist Elex Michaelson on "The Story Is With Elex Michaelson," and during their 10 minute interview, Gavin slammed Rogan for dismissing his repeated requests to go on "The Joe Rogan Experience." The Joe Rogan Experience

Check out the video ... Gavin seems a bit annoyed as he discusses how Joe has attacked him for years, but refused to ever have him on the podcast for a debate.

Gavin also said he's moving on from trying to get a face-to-face with Joe, giving Rogan one last parting shot while making the Facebook comment.

It's not the most clear diss, but t

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