City fans have become frustrated having watched the team fail to win at Ashton Gate for two months with numerous late goals being scored by the opposition their main failings.
"Unfortunately, we`ve got some people out there that don't mind being abusive, let's say," he told the Evening Post.
"Nobody has got an excuse for that.
"We just have, as a club on and off the field, to keep going. We have to try to improve it when we can and we will. We will work morning, noon and night to improve it and see whether we can.
"The only improvement you can make is to make sure the opposition don't get the play at the end of the game that gives them the opportunity to score."