Millen's View: Ipswich home 0-1
The Robins wracked up nineteen attempts on goal during the 1-0 defeat against the Tractor Boys at Ashton Gate, leaving Millen immensely frustrated.
And the 44-year-old gaffer recognises the need for his whole team - not just his strikers - to start converting chances into goals sooner rather than later.
"We should definitely have done better and really ought to have scored at least one goal based on the chances we created," the City manager told BBC Radio Bristol after the game.
"Unfortunately, individuals did not perform to the best of their ability. The players are on the field because of their strengths and they did not produce enough of what they are good at.
"That's two games now [against Millwall and Ipswich] where we have created enough chances to win, but have not scored.
"It is a concern, one I'm going to have to address in the summer.
"If we are going to progress, then we have to be more clinical.
"This is not the first time this has happened to us this season and it's a matter of getting the balance right in the squad.
"We worked a lot of good situations, but our final ball was not good enough and we didn't work their keeper nearly as much as we should have done."
City will be aiming to put their goalless 180 minutes behind them when they travel to the Championship's basement team Sheffield United on Saturday.