The former EastEnders actress annoyed the show's stars with her constant criticism of their performances, with the situation worsening as the series progressed to its grand final.
A source told The People: "Martine has become a real hate figure among the contestants. She always had something negative to say whether it was about their singing or their outfits.
"After every bitchy comment the contestant would head backstage and slag her off to the others. They just couldn't believe she was being so patronising to them."
A spokesman confirmed: "Some contestants have mentioned Martine's comments saying they found her patronising."