Celtic manager Neil Lennon was angered by his side's performance in their 3-2 defeat to St Mirren in the Scottish Communities League Cup semi-final.
St Mirren had gone ahead through Esmael Goncalves, before Gary Hooper pulled the Bhoys back level.
However, two goals in five minutes from Paul McGowan and Steven Thompson sealed the victory, with Charlie Mulgrew only able to salvage some pride with a consolation goal in the dying minutes.
Lennon told the club's official website: "I am bitterly disappointed with that performance.
"It was soul-less.
"It lacked intensity, desire and a will-to-win."
It is the fourth year in a row that Celtic have failed to win the competition, losing to Kilmarnock 1-0 in the final last year.
Having beaten Barcelona, one of the best teams in the world, in the Champions League back in November, Lennon felt that the team he was watching was not the same team that had performed incredibly well over the last year, especially in Europe.
The Irishman added: "It lacked all the attributes that this team has shown over the last six to nine months.
"I don't know where that performance came from."
With scores level at 1-1, Celtic were given a golden opportunity to take the lead, when Jim Goodwin handled the ball in the area.
Mulgrew was given the responsibility of taking the resulting penalty, but it was well-saved by Saints goalkeeper Craig Samson.
While St Mirren will go on to play Hearts in the final at Hampden Park on March 17, Celtic will be looking forward to their Wednesday game against Kilmarnock, as they hope to extend their lead at the top of the table.
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