OK! Exclusive: Find Out Why The Kardashians Are Turning Against Kim Kardashian!

A source tells OK! Magazine exclusively, “Kim’s ego is out of control, and it’s starting to grate on them. They definitely want to bring her down a peg or two.”

Recently, Kim and Kourtney bumped heads, after the curvy beauty became upset with Kourt for refusing to participate in her new video game app, which has garnered her millions of dollars.

So what did Kim say to Kourtney? She told her she “bought” her ungrateful sister a career! How rude?!

Especially considering that last year, Kim told her she has “gotta lose a couple pounds.” Well, she’s certainly done that and more!

“Khloe’s the one laughing,” says the source. “Everyone’s asking, ‘How’d you get that body? She’s feeling good about herself and she deserves it. She’s not listening to Kim and her pathetic put-downs anymore.”

Meanwhile, Kim may be Rob’s least favorite sibling, judging from a post he recently put on Instagram. He compared his sister to the “b-tch from Gone Girl.” Ouch! So why did he lash out? “That was just the way he was feeling and he couldn’t be bothered to hide it,” the insider revealed. ”Rob and Kim’s personalities don’t click, and like everyone else, he’s done holding his tongue.”

And you know you’re disliked when even your mother stops giving you a lot of attention. Though Kim and Kris have been super close over the years, sources say Kendall is Kris’ new favorite, and Kim isn’t happy about it! “Kim doesn’t like playing second fiddle. Kris is barely giving her a thought and it’s making Kim’s blood boil.”