Coach Colin made his feelings clear after the 1-1 draw at the Walkers Stadium last night.
Jamie Slabber bagged a 20-yarder to level the scores just before the break after the home side's opener in the 37th minute and it stayed that way.
"It was a very good game played at a good tempo throughout," reflected Colin. "I said before that it's about results and although the performance wasn't enough for a victory, we ground out a draw when we didn't play anywhere near as well as we would as liked.
"We were really careless with the ball in the second half and looked like we were starting to get tired.
"That was exaggerated because we kept giving the ball away and therefore had to work hard to get it back. We were careless in possession.
"Leicester must feel aggrieved they haven't won and we spurned opportunities to put them under more pressure by keeping the ball.
"The pleasing thing is that we've got a draw out of it. A lot of the performances were below standard, that's disappointing and a lot of that came down to our inability to keep hold of the ball."
Colin Calderwood ran a critical eye over last night's reserve display despite picking up a point in a tricky FA Premier League opener at Leicester City.