Sunderland boss Bruce: Hughes deserved time at Man City
Hughes' last game in charge ended with City beating the Black Cats 4-3 at Eastlands - and two hours after the final whistle his departure was confirmed, with Roberto Mancini immediately named as his successor.
Bruce sympathised with Hughes, who was City manager for 563 days.
He explained: "With the industry we're in, I'm disappointed for any Premier League manager who loses their job. It's the worse feeling in the world and if that's the case (that Hughes is going to be sacked) I'm disappointed for him."
Bruce reasoned on Sky Sports News: "You can't build clubs in 18 months or one transfer window, you need a bit of time.
"It's got to stop. What the hell's the point spending years getting (coaching) badges and qualifications when you only get six months in the job?"
The announcement about Hughes' non-appearance at his post-match press conference was made only a couple of minutes before Bruce appeared.
The Sunderland manager continued: "When things are not going well there is a clamour for the manager.
"I don't think anyone is surprised by these things anymore.
"It is ridiculous. You are not going to encourage any young person to try and take this up. What is the point?
"What are the stats? Managers last about 18 months in the Championship. It is longer in the Premier League but that is because of the amount of time Sir Alex Ferguson, Arsene Wenger and David Moyes have been in their jobs.
"I am disappointed for Mark Hughes. Really disappointed."