Kubica was retired on lap 28 after his team-mate George Russell crashed into a wall just a lap earlier.
“I don’t understand that decision,” said the Pole.
“My goal was to finish all the races. I don’t understand the decision, I could stay out on the track.”
“It’s my worst weekend in F1. Finishing all races was my main goal. Unfortunately, I won’t achieve it.
“I could say something, but it might be wrong, so better not to say anything.
“We are not in an easy situation and Japan is around the corner.” concluded Kubica.
Source: Eleven F1