The Toffees threw away a one-goal lead in their semi-final clash on Saturday and were knocked out thanks to a Luis Suarez equalizer after Sylvain Distin's under-hit back pass and a last-gasp winner from Andy Carroll after Seamus Coleman gave away a needless free-kick.
Liverpool have enjoyed a mediocre season in the Premier League, and will be underdogs in next month’s final against either Tottenham or Chelsea.
"I think it's going to be difficult for them.” Tim Cahill told reporters. "They've had an indifferent season and they've just got away with it today.
"They made some good substitutions and they scored two goals from two errors from us."
The Australian was disappointed by his side’s second half performance but believes they were on the receiving end of a number of poor decisions.
"A few decisions didn't go our way but I'll just say they've got a lot of work to do." Cahill continued.
"As a team, we'll look at it, but we win together and lose together and that's the only way I can sum it up.
"It's a special group of lads and management and everyone really, really pulls for each other."