David Coulthard heavily criticised his McLaren team after seeing a potential win in the Malaysian Grand Prix slip through his fingers because of car failure.
Coulthard was bitterly disappointed to retire so early
The Scot was in second place and in a strong position ahead of his team-mate and eventual winner Kimi Raikkonen when his car stopped with an electronics problem on lap three.
Coulthard said: "I'm very disappointed. These are the sort of situations [we have to capitalise on], especially with a year-old car. We should have reliability and we still can't get the car to the finish.
"It's just not good enough. Ferrari are still the benchmark for reliability."
Coulthard's frustration was exacerbated by the fact that McLaren have started the season with a revised version of last year's car to benefit from improved reliability.
I am getting the job done... you've got every reason to expect I would have won that race
On top of that, Michael Schumacher had damaged his car in a first-lap accident with Jarno Trulli and it was a good opportunity for Coulthard to extend his lead over the German.
Coulthard started the race in the championship lead having won in Australia two weeks ago.
But he is still in second place, six points behind Raikkonen and two ahead of five drivers tied on eight points - Schumacher, Juan Pablo Montoya, Fernando Alonso, Jarno Trulli and Rubens Barrichello.
McLaren boss Ron Dennis described Coulthard's retirement as "disappointing".
Coulthard pointed out that he has outqualified Raikkonen at every race since last year's Italian Grand Prix in September.
"I was lying in bed and I was thinking 'you know, it's not since Italy that he's outqualified me.' The last couple of races last year and the first two of this year I've been in front of him," Coulthard said.
"You've got every reason to expect I would have won that race today as well."
Coulthard said he was genuinely pleased for his team mate but failed to understand those who questioned his own performances.
"I am getting the job done... if I don't get a reliable car, I can't do any more than what I've done."