Clive Allen felt the key moments went against us as out reserves lost out 3-2 to Portsmouth on Monday night.
Development coach Clive was referring to a combination of conceding poor goals and not taking our chances as we led twice only for two goals in quick succession in the second half to secure maximum points for the visitors.
Charlie Daniels and Adel Taarabt netted as we led 2-1 at the break only to miss two chances to put the game out of reach at the start of the second half.
Pompey capitalised with two goals in five minutes midway through the half but we still managed to create further chances and Taarabt struck the woodwork with eight minutes left.
Summing up his feeling after the game, Clive admitted: "It's pure frustration, more than anything.
"I was delighted with how we played in spells. I thought the movement and passing was excellent to create good opportunities but that cutting edge let us down in crucial periods when we could have wrapped the game up.
"We also shot ourselves in the foot with some poor defending, going to sleep at vital moments when we'd actually limited them to few chances but they had a clinical edge.
"They took their chances and we paid the price for that.
"There were some excellent individual performances but overall it's a real disappointment that we didn't come away with all three points, let alone lost the game."