Robert Snodgrass claims the playing staff at Leeds must accept responsibility for the club's inability to clamber back into the play-off positions.
The Whites have been in and around the Championship's top six for much of the season, but their inconsistencies over recent weeks have held them back.
A surprise 2-1 defeat away at struggling Coventry on Tuesday has left the club six points adrift of the promotion-chasing pack.
Simon Grayson paid the price for failing to put Leeds in contention with his job, and caretaker coach Neil Redfearn saw decisions jeered by certain sections of the travelling support at the Ricoh Arena.
Snodgrass admits Leeds desperately need to get their house in order, with the club currently lacking the 'winning mentality' required to force their way back into the Premier League.
"It's very, very frustrating right now," he told the Yorkshire Evening Post.
"There's not really anything to say, apart from that it's the players' fault. We as a team know we need to be better.
"We can't sit around and blame anyone else. It's down to us, the players. We know exactly what to expect in the Championship. It's our second season here and we should know what to do.
"There's enough talent here for us to go and win matches but it's down to getting the mindset right, the mental approach to the game.
"You need a winning mentality and I don't think we've got it right now. That's what it takes to be up there at the top."
Meanwhile, reports suggest Leeds will not be approaching Lee Clark regarding their vacant managerial post.
Clark was expected to be a leading candidate for the role after being sacked by Huddersfield on Wednesday, but Leeds are understood to be reluctant to appoint a man with no previous coaching experience in the Championship.