>>374030G.G. Allin had some catchy songs here and there, but he's known mainly for his notoriety in reaching a basically unbeatable level of personal repulsiveness and antisocial behavior. He would regularly take dumps on stage, eat his poop or throw it at the audience, fight concert attendees, walk around naked with his tiny pecker out, and would also shove things up his butt. He became friends with John Wayne Gacy, was arrested dozens of times, wrote songs promoting murder, pedophilia, bestiality, general rape, and necrophilia, and sucking his ass (it smells). There were other musicians who would engage in antics similar to his (I think he might have been drawing from the types of things Iggy Pop had been known to do) or who would adopt transgressive or antisocial personae, but G.G. Allin's act was notable for both its intensity and consistency. He was a total package of depravity. You aren't going to find many performers willing to take things as far as he did and claim his rotten mantle for themselves. He made most shock rock types look positively tame by comparison. I wouldn't call him a faux rebel with how seemingly devoted he was on violating as many societal taboos as possible.
OP's "movie" is just AI fakery as far as I can tell. Anyone interested in G.G. Allin who also has a strong stomach should just watch pic related. And maybe also follow that up with that documentary from a while ago that featured Merle Allin and their mother. I wouldn't watch a Hollywood drama about him, but G.G. Allin was definitely a captivating figure (albeit in a "human car accident" kind of way). It's interesting to try and figure out just how much of his character was an act. He could actually come across as a pretty normal guy when he wasn't in performer mode.