Williams couldn't introduce its new car to pre-season testing for two days, with the production being delayed as a result of poor organisation skills - something that certainly played a role in Paddy Lowe's decision to take an indefinite leave of absence from the side.
The Russian driver feels sorry for his former team and wishes them all the best.
"I feel quite sorry to comment about Williams because we all know that the team is in a very difficult position but at the same time I have so many great friends there, so many people," Sirotkin said to Crash.net.
"I know that we only spent one season together but it's a very, very long year and we spent so many days together at the factory, together at race tracks, all day long working together in such a difficult situation that it really feels like I've been there forever. I really feel sorry for them."