Writing in his column for The Sun, the outspoken choreographer accused Atack of not putting in enough effort on the ice.
Gardiner commented: "[She] should be next to go. She has not once given any sort of a performance. She's just got one safe level and never raises her game."
The programme's panellist also complained that he was unimpressed with Danny Young's rock 'n' roll performance in Sunday night's show.
He said: "[Danny] can't sustain a performance. Rock 'n' roll must be sharp, clean and dynamic, particularly in the lifts. But his were laboured. He needed his big muscles, but it turned out they're all for show."
Dancing On Ice continues on Sunday at 6.50pm on ITV1.