Louis has now branded Nick and Rita inexperienced “lightweights” who didn’t have the “right credentials” to judge the talent.
Speaking to Best magazine, he claimed he said he would only return to ‘The X Factor’ if there were fellow judges “who knew what they were talking about”.
“Sharon and I are old, but that means we’re far more experienced, unlike the young whippersnappers on last year’s panel who didn’t know a thing about talent,” he said.
Rita was said to be in the frame for a return this year, but Louis claimed it was him and Sharon who “pushed” for Simon to take Nicole back instead.
“We didn’t want Rita Ora,” he said. “It turned into a fashion show. The panel didn’t have the right credentials. They were lightweight.”
Louis’ comments come following Simon’s admission that he knew last year’s series would not be a success, before it had even aired.
The 12th run of the talent show suffered some of its lowest ever ratings, and changes to this year’s series have seen Caroline Flack and Olly Murs leave their roles as co-host, with former presenter Dermot O’Leary returning.
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'X Factor' Judges Through The Years
Series 1-3 (2004-2006)(01 of11)
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The original line-up: Sharon Osbourne, Simon Cowell and Louis Walsh (credit:ITV)
Series 4 (2007)(02 of11)
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All change: Dannii Minogue joins Simon Cowell and Sharon Osbourne, with Brian Freidman replacing Louis Walsh.Dermot O'Leary also replaces Kate Thornton as the show's host.
Series 4 (2007)(03 of11)
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The return of the Walsh: Louis makes a comeback after Brian Freidman is axed from the panel after only a few days of auditions.
Series 5-7 (2008-2010)(04 of11)
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The golden era: Cheryl Cole replaces Sharon Osbourne, joining Simon, Dannii and Louis.
Series 8 (2011)(05 of11)
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A mass exodus: Gary Barlow, Tulisa and Kelly Rowland join the only original remaining judge, Louis Walsh.
Series 9 (2012)(06 of11)
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Schermazing: Nicole Sherzinger replaces Kelly Rowland, joining Gary, Tulisa and Louis.
Series 10 (2013)(07 of11)
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She's BACK! Sharon Osbourne rejoins the panel after five years, replacing Tulisa and joining Louis, Gary and Nicole. (credit:Rex)
Series 11 (2014)(08 of11)
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REUNITED: Simon and Cheryl return alongside Louis Walsh and new judge Mel B. (credit:Syco/Thames/ITV)
Series 12 (2015)(09 of11)
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Bye bye Louis: Nick Grimshaw and Rita Ora replace Louis and Mel, as they join Simon and Cheryl on the panel. Meanwhile, Caroline Flack and Olly Murs step into Dermot's shoes as hosts. (credit:Twitter)
Series 13-14 (2016-17)(10 of11)
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A vintage line-up: Nicole, Louis and Sharon all stage sensational returns to the panel after the departures of Cheryl, Nick and Rita, while Dermot also returns as host. (credit:ITV)
Series 15 (2018)(11 of11)
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WTF?! Louis Tomlinson becomes the first former contestant to join the panel permanently, while Robbie joins the panel alongside his wife and 'Loose Women' panellist Ayda Field. (credit:Doug Peters/EMPICS Entertainment)