UPDATED: Sean Penn’s humanitarian romance “The Last Face” is being savaged on Twitter after premiering Friday at the Cannes Film Festival. Commenters on social media are describing the film, which stars Charlize Theron and Javier Bardem, as the worst of the fest. Others are also quipping that the picture is so awful that it destroyed Penn’s relationship with Theron. The duo broke up a year ago. When critics weighed in, they largely echoed the flash reactions that bubbled up online.