Blues suffered their fourth home defeat of the season against Ipswich on Saturday with former Blues striker DJ Campbell scoring what proved to be the winning goal for the vistors just eight minutes into the match.
"We're creating a negative attitude around the stadium with our first-half performances," the Blues manager said after the 1-0 defeat.
"We're starting home games, particularly those against Barnsley, Huddersfield and today, so flat that the crowd become apprehensive and a bit bored to be honest with you because they're not getting dished up with any quality or drive.
"Then they do it in the second half. But why? Why not do it from the first whistle?
"I like continuity and I try to keep the same team but, with the exception of one or two, there aren't many putting down markers week in, week out to hold down a regular place in the team.
"I hate changing the team around but I've got to have players who are playing consistently well week in, week out home and away."