St Just batsman Mark George says his side did not fulfil their potential in the Twenty20 club championships.
St Just reached the semi-finals but were knocked out by the eventual winners Ealing at Chelmsford.
"We're bitterly disappointed, the time before when we came on TV we didn't really know what to expect," George told BBC Radio Cornwall.
"But this is a bitter pill to swallow as one or two of us probably haven't performed," he added.
It was the third time that St Just have been beaten at the last four stage of a national competition, having lost in the 2006 and 2007 semi-finals of the 45 over event.
"It looks like another 25 to 30 runs might have been enough but it's the way it goes and you just have to take it on the chin," George added.
"We are disappointed. We think we could have gone through if we'd just performed a little bit better," he said.
However St Just have been on good form in Cornwall, winning the WT Edwards and Vinter Cups, although they finished fifth in the Cornwall Premier League having won it six consecutive times from 2004-2009.
But George says cricket is on the up in Cornwall.
"This is a special time for Cornwall and us representing the county up here shows Cornish cricket is bang on the money and should go forward.
"The cricket is really now flying and long may it continue," he added.