Sam won over Nicholas in Sunday night's final, scoring over 60% of the public vote in the final showdown.
But Scottish singer Nicholas reckons that the panel did everything they could to ruin his chances, with the X Factor 2013 voting stats showing he was at times within a few percent of Sam and three weeks even ahead of her.
During the live show, even Nicholas' mentor Louis opening backed Sam, calling on viewers to vote for her.
"I don’t know what that was about and it was rude of him," Nicholas is quoted as telling the Daily Mail newspaper. "He should have been backing his own act and not encouraging the public to vote for their opponent."
And Nicholas also hit out at Gary Barlow, claiming the Take That star had been against him for the whole series.
The 17-year-old told the newspaper today: "Gary had a problem with me throughout the whole show.
"He never seemed to like me and whenever I gave a good performance he would pick up on the smallest things in the world."
Louis Walsh continued to find himself in hot water after the show on the Xtra Factor, saying that Nicholas would only be heading back to Scotland now the show was over.
His comments prompted a series of angry messages online from Nicky's fans, with one branding Louis a "p***k"
Browse pictures of Sunday night's X Factor 2013 final results below...