Socceroos star Tim Cahill believes his former club Everton are 'confused' and have lost their 'identity'.
Cahill's criticism comes after Toffees fans turned on boss Sam Allardyce during their 1-1 Premier League draw at Swansea City.
Everton fans sang 'We're sh** and we're one-nil up' at half-time before singing 'f*** off Sam Allardyce' after the manager replaced winger Yannick Bolasie with central defender Ramiro Funes Mori in the final quarter.
"It's confusing and I think (the fans) are confused too," Cahill, who made nearly 300 appearances for Everton between 2004 and 2012, told Sky's Goals on Sunday show.
"I feel we've lost our identity as a club. I feel like there's nothing that we're really stamping and building around.
"Forget about when I was there or some of the players before, but we had a group of players and a basis that was built on and then added to.
"We were looking to the long-term plan of how we were going to evolve as a football club.
"Now it seems that we're just making signings and the chemistry is not there."
Optimism was high at Goodison Park at the start of the season after owner Farhad Moshiri had invested heavily in the squad.
But manager Ronald Koeman was sacked in October and, although Allardyce has steered Everton away from the threat of relegation, unease over the team's style of play has seen the former England manager heavily criticised by supporters.
Everton are currently ninth in the Premier League and Allardyce spoke last week of his determination to be in charge at Goodison Park next season.
"On the pitch it's just not linking well," said Cahill, the veteran Australia attacker who returned to his first English club Millwall in January.
"It's difficult to watch if I'm honest because of the quality.
"You want a big owner with money. OK, we've got that, but that doesn't always bring you success overnight.
"But I know the fans want some passion, they want an identity.
"When you look back to Roberto Martinez's style of football maybe the Everton fans were impatient.
"Under David Moyes maybe they thought it was getting stale. But now you can appreciate what you've lost."