Rosie O'Donnell -- Impossible on 'The View'... Days Are Numbered

Rosie O'Donnell is a "malcontent" who is bringing down "The View" and is impossible to deal with ... so claim well-placed sources in the show's production.

We're told Rosie came in thinking she'd be in the lead position at the table -- "the moderator." We're told she was outraged when it became clear the title and the power belonged to Whoopi.

Our sources say Rosie has been impossibly rude to members of the cast and crew, both on and off camera.

We're told she seems "very depressed" and has few personal interactions with anyone off camera.

The ratings are down and execs are blaming Rosie.

The honchos have tried talking with Rosie but they say it's like talking to a wall. They doubt she will even finish the season and another season we're told is "out of the question."

Rosie's rep tells TMZ ... "This is absolutely false! Whoopi Goldberg has been the moderator since Whoopi was hired and Rosie knew that before she took the job."