The Tigers boss says he has "never felt so disappointed" after the striker walked out of transfer talks, although the 31-year-old has blamed the club in a response via Twitter
The 31-year-old was in the middle of transfer negotiations with the Tigers but allegedly walked out to begin talks with Blackburn Rovers after claiming he was going to get lunch.
However, Campbell could not finalise a deal and ended up staying at Loftus Road, prompting Bruce to describe the forward’s behaviour as “shocking”.
"The way they handled the situation, saying they were going for lunch and then going to Blackburn, was shocking," Bruce told BBC Radio Humberside.
"I've never felt so disappointed. We were left trying to find out where they were for the best part of two hours.
"I've got absolutely no problem with him going to Blackburn if they'd just phoned and said 'thanks for your offer but we've had a wonderful offer from Blackburn'.
"The lack of respect by him and his representatives left a bad taste in the mouth."
But, taking to Twitter, Campbell has since responded to Bruce’s claims, voicing his displeasure at the events of deadline day and suggesting that Hull had wasted his time.
“I drove 4hours to hull for discussions & gave them 5/6hours to sort the deal & they didn't, instead they wasted mine & my families time,” he tweeted.
Campbell has been at QPR since 2011, when he signed from Blackpool, and has scored once in 11 appearances for the club.