Radrizzani, who completed his 100% buy out of former owner Massimo Cellino in May, has questioned the players’ commitment after seeing a promising start to the season evaporate.
“We give them everything possible to just focus on the football, as a club we support them in everything,” the 43-year-old Italian told talkSPORT.
“We gave them long-term contracts, we supported them in pre-season going on a camp in Spain, we did everything they wanted.
“But we didn’t get back their commitment, their passion and spirit, particularly in the game, a really important game when we played really poorly against Middlesbrough.
“For me it was the bottom of the season because there was no commitment, no passion, no spirit.”
That 3-0 defeat at the Riverside earlier this month came in current manager Paul Heckingbottom’s fifth game in charge.
Leeds sacked Thomas Christiansen in early February after a seven-match winless run, while former Barnsley boss Heckingbottom has won just one of seven games since arriving at Elland Road.
“I don’t want players in my team representing Leeds United with this behaviour,” Radrizzani added. “So I hope they can learn and be with me next year, playing better and with more commitment.”