Birmingham co-owner David Sullivan has blamed some of Steve Bruce's summer signings for their relegation from the Premier League.
Blues suffered relegation back to the Championship on Sunday after Fulham picked up a 1-0 win at Portsmouth rendering Birmingham's 4-1 success over Blackburn as worthless.
Sullivan who came in for abuse from sections of the St Andrews faithful, along with chairman David Gold, believes some of the blame for the club's failure must lie with former boss Bruce and his poor signings.
The outspoken Blues chief singled out defender Frank Queudrue and goalkeeper Richard Kingson as big disappointments from the players that arrived at the club last summer.
Wrong"Where we went wrong is we brought in nine or eight players last summer and spread the limited resources we had when we'd probably have been better just signing three players and going for better-quality players," Sullivan told Sky Sports News.
"He (Bruce) thought he needed numbers - we went for numbers.
"So instead of going for quantity, we should have gone for quality some of those players have been incredibly disappointing.
"Franck Queudrue, I will name you one. We bought a third choice goalkeeper - a complete waste of space.
"I could go right down the list and nobody has really shone out.
"We spent £2.25million on Franck Queudrue and he has been a major disappointment to the club.
"Most of what we signed last summer has been a disappointment.
"The bottom line is we didn't improve the team last summer that is where it all started what we bought last summer."
UpsetSullivan is looking to sell his stake in the club after being hurt by the abuse aimed at him at the end of the victory over Blackburn.
Sullivan claimed his children were brought to tears by some of the chanting during yesterday's final game of the season.
"I've got my young kids with me, my kids are in tears. I can't repeat what was chanted," added Sullivan.
"It's all f's and c's and w's, and things like that, which I don't need in my life.
"It isn't part of the game, as far as I'm concerned. It isn't acceptable."
He added: "It's the venom. It wasn't just half a dozen people.
"At the end, you've probably got 1,000 people, 1,500 people on the pitch that ripped down goalposts.
"Those people ruined it for everybody."