Featherstone chief executive Craig Poskitt says the dual-registration system is "bad for the integrity of the sport".
Rovers, minor premiers in the Championship for the past three seasons, have refused to adopt the system and a partner club, as have rivals Leigh, Sheffield and Halifax.
It has led to much criticism, but Leeds coach Brian McDermott said last week that he believed dual-registration is raising standards outside Super League and is good for the game.
Poskitt told the Yorkshire Evening Post: "It is not working.
"I think from Super League clubs’ point of view they will be quite happy saving six-figures per annum with no Under-20s.
"But it has been bad for the progression of the game and certainly for the integrity of the lower clubs, it is abysmal."
Warrington have secured their place at the top of Super League with a one-sided 30-point victory over title challengers Wigan at the Halliwell Jones Stadium.
Hull KR are set to introduce a reserve team for the 2017 season.
Widnes coach Denis Betts is set to be named as an assistant coach with England.
Hull KR are looking to sign a marquee player as part of the club's new five-year plan.