Alonso and Hamilton have had a strained relationship this year

Alonso rowed with team management over the way they treated him and rookie team-mate Lewis Hamilton.

"McLaren lost the championship for the mistaken decisions in the second part of the season," he said.

"It isn't a secret that they haven't helped me much. It wasn't a very well-organised season from the point of view of the management."

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Alonso, who has won the last two titles, finished third in this year's drivers' championship, behind Ferrari's Kimi Raikkonen and Hamilton.

McLaren were expelled from the constructors' championship as a result of the 'Spygate' saga.

"There was no sensation of being a team and the result speaks for itself," Alonso continued.

"Each person will have to draw their own lessons from this season but if we had taken a different approach we would have obtained different results.

"In the last few races my hands and feet were tied. I had no power to make decisions. I had to race as they told me.

"McLaren lost and Ferrari did a better job than anyone else."

Asked whether he could see a future with the British-based team, Alonso said: "The only reality is that I'm under contract to McLaren.