A new documentary shows a stressed-out Beto O’Rourke saying the F-word, snapping at his campaign staff and being a self-described “a–hole” — but the potential presidential contender had no qualms about attending the flick’s premiere at the South by Southwest festival in Austin, Texas, on Saturday.

“I know I was a giant a–hole to be around sometimes,” O’Rourke concedes at one point in “Running With Beto,” which follows his near-miss Senate campaign against Ted Cruz.

Democrat O’Rourke granted near-total access to filmmaker David Modigliani. The movie “captures the candidate dropping F-bombs, clenched with stress, complaining about having to ‘dance’ for the press, and snapping at his staff,” ­NBCnews.com reported.

At the premiere, O’Rourke declined to reveal if he’s running for president, telling reporters only that he’ll make the announcement “the right way and tell everyone at the same time.”