Loris Capirossi admitted he is angry with Suzuki's uncompetitiveness after struggling to a distant 13th place in the Dutch TT at Assen on Saturday.
The Italian and his teammate Alvaro Bautista were last on the road save for Hiroshi Aoyama's slow stand-in Kousuke Akiyoshi, and finished more than a minute behind race-winner Jorge Lorenzo.
And Capirossi – a nine-time winner in the top class – revealed he is becoming increasingly frustrated with the lack of feel he is receives back from his GSV-R.
"I just don't know what to say after this weekend – when I try to go quicker than I did today I feel like I will crash and when I try to make a race I end up almost last," he said. "The effort we are putting in is a lot and I am really angry and annoyed, because the whole team is trying really hard, we make so many changes to try to find the best solution and we just cannot find it.
"We just had no feeling at the start today and we needed three or four laps to get any kind of feel in the tyres, but by then it was too late.
"It is the same to finish 11th or 13th, both positions feel the same and it is just not good enough, we need to make some big changes for next weekend so we can try to be more competitive."
Paul Denning, boss of the Crescent team which runs Suzuki's factory effort in MotoGP, said that the entire team is disappointed with the results of the bike, which has so far scored a total of 30 points from six races.
"Things have been very difficult this season and they didn't get any easier today!" said Denning. "I want to say sorry to Loris and Alvaro that we couldn't give them a competitive machine today, Loris especially is incredibly frustrated and that frustration is shared by all of us.
"We have to keep working hard and keep focused to find the key that will allow the riders to perform to the best of their abilities."