( CNN ) Another Kardashian heard from . Usually the Kardashian-industrial complex is dominated by comments and social media postings from Kim , followed closely by Khloe and perhaps one of the Jenner children . But on Sunday , it was Rob , the youngest of the four Kardashian siblings , who drew most of the attention . In an Instagram post , Rob Kardashian compared his sister to the sociopathic Amy Dunne , the murderous wife played by Rosamund Pike in `` Gone Girl . '' `` My sister kim , the b**** from Gone Girl , , , '' he posted . He accompanied the text with a photo of Pike 's character drenched in blood , fresh from ( spoiler alert ! ) killing her ex-boyfriend . He also unfollowed his entire family , though he changed his mind later . It 's not the first time Rob has been at odds with the heavily spotlighted Kardashian clan . He missed out on Kim 's wedding to Kanye West , with various ( unnamed , of course ) gossip sources reporting at the time that he was n't getting along with members of his family . Khloe Kardashian , who has stayed close to Rob , told Wonderwall.com that he may have a `` kind of social anxiety . '' `` I just feel , especially over the last year , Rob has become very introverted and has a kind of social anxiety , '' she said . `` He 's definitely not at his happiest place that he once was , and I know he can get to that happy place and he will . ''
Rob Kardashian posts a pic from `` Gone Girl on Instagram . He compares the lead character to his sister Kim . Rob Kardashian has had an uneven relationship with family members .