The Australia international scored the goal that took Dennis Wise's team to the 2004 FA Cup Final. While the exposure brought Cahill a £1.8m move to Everton and a role in their qualification for the Champions' League, Millwall are on their fourth manager and third chairman since their trip to Cardiff and are second from bottom in the Coca-Cola Championship.
David Tuttle's team are unbeaten in their past four games but Cahill believes that his former employers are suffering from a lack of ambition. "Millwall was a great club for me, it is where I learnt my trade and it brought me some of the best times I have had in football," said the midfielder, who has scored three goals in his past two games. "But there were a lot of big players at the club and it was disappointing that the club didn't buy big to try and get into the Premiership.
"What has happened there was inevitable when you get rid of a lot of big players and the chairman cashes in. We had a chance to build a squad, make it big and keep players, but it went to pot when they started getting rid of the players who made the club tick."