The bottom three places of the Premier League are occupied by clubs which have sacked managers this season.
Bruce said: "If you're a bottom-half club, you can go six or eight weeks without a win quite easily.
"It happens at the top end.
"When you see someone like Arsenal getting beat 5-0 and 6-0, that shows you what we're up against.
"I think it proves that, unless players have downed tools totally, it's not always the right decision to sack the manager.
"We've seen a flurry this year. Sometimes it works, at Palace for example, but it's difficult.
"I wish all the managers well because I know how difficult it is, especially managing in this league, where you do come under pressure."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball