Director of cricket Martyn Moxon has admitted frustrations with Yorkshire's T20 Blast performances this season.
The White Rose have won just four of their 12 T20 games, despite having big-name signings such as Glenn Maxwell and Aaron Finch.
Yorkshire lost three wickets in five balls as Worcestershire beat them with ease by 74 runs on Tuesday.
"The players we've got should be performing better than they are," Moxon told BBC Radio Leeds.
"We've done a lot of talking and discussion but we haven't found the answers yet.
"We have to improve because the facts are it's not good enough."
|Yorkshire's T20 campaign: The statistics|
|Yorkshire's death bowling has been a problem. Against Worcestershire on Tuesday, they conceded 103 runs from the final seven overs.|
|Captain Andrew Gale has struggled with the bat, with his highest score of 68 not out coming in Yorkshire's first T20 game of the season.|
|Yorkshire lost both their Roses clashes, with Lancashire winning from the final ball of the game at Headingley.|
Moxon admitted that Yorkshire had little hope of qualification for the quarter-finals, even though it is mathematically still possible.
Yorkshire have failed to advance beyond the group stages for the past three years, since losing to Hampshire in the 2012 final.
In contrast to their poor limited-overs form, Yorkshire currently top the County Championship Division One table.
"Our batting, apart from a few individual performances, as a team has been poor," Moxon added.
"We are conceding far too many runs at the end of the innings and at the front as well.
"We now have to use the last two games to prepare for the 50-over competition."