Edinburgh head coach Rob Moffat spoke of his frustration after seeing his side round off their Heineken Cup Pool One campaign with a 21-14 defeat against Cardiff Blues at Murrayfield.
Both sides had already been eliminated from the competition with Northampton already confirmed as pool winners, but Moffat was disappointed to see his side fail to capitalise on scoring the only try of the contest through centre Ben Cairns.
"I thought we defended well for long stages but we gave way some cheap points," said Moffat after a fifth defeat from five games in Europe this term.
"I thought we put a lot into the game and I couldn't fault the effort.
"At 14-9 I thought we were on top and thought it would come down to the next score. I'm a bit frustrated because I thought we worked hard for 55-60 minutes but we didn't kick on and win the game."
Fly-half Chris Paterson kicked nine points with the boot to put the Gunners in front and they looked set to end another disappointing European campaign with a victory.
But poor discipline allowed Wales wing Leigh Halfpenny to kick four further penalties to end with a personal haul of 15 points and give the Welsh side victory. Scotland fly-half Dan Parks kicked their other points.
Reflecting on Edinburgh's campaign as a whole, Moffat admitted that his side had simply not been consistent enough.
He said: "Europe is a fantastic competition but you have got to be right at the top of your game.We've played well in patches but that's not enough."