The band – Leigh-Anne Pinnock, Jade Thirlwell, Perrie Edwards and Jesy Nelson – won the ITV show in 2011 and have gone on to launch their own rival talent series The Search on BBC, while The X Factor’s ratings have plummeted in recent years.
“The problem is when it’s like a script. It lost its authenticity. The minute it doesn’t seem real, you switch off.
"How am I meant to believe in it? I could literally write it myself and tell you what’s coming next.”
Watch: Little Mix being quizzed to see how well they know their own lyrics
And Nelson – who has spoken out previously about the depression she had suffered after being bullied on social media by internet trolls since entering the spotlight – said their show will prioritise aftercare to their contestants, taking a swipe at The X Factor’s duty of care.
She said: “We never had anyone check on us to see how we were doing mentally, it was all just go, go, go.”
Pinnock agreed: “I wish there was a lot more help.”
But despite their criticisms of the show that made them famous, Little Mix insist they have no vendetta against the show’s boss Simon Cowell.
Thirlwall said: “I think with Simon it’s all fun and games. We’ve got no personal vendetta against him.
“We moved on and, to be fair, over the years we didn’t actually see him that much. We’re not ones to hold grudges.”
Edwards added: “The best revenge is success.”
Since Little Mix won The X Factor they have released five albums and had four number one singles in the UK charts.
Cowell has announced plans to “rest” The X Factor for 12 months after spin-offs Celebrity and The Band failed to bring back viewers.