> In truth, I am dissatisfied with all of these conditions, but not because they impact my safety on board trains; I’m appalled by our city’s failure to help the individuals

Except that has literally nothing to do with the survey. The heading of the question is something like, "How satisfied are you with the A train?". If you are dissatisfied with the city's inability to deal with the situation, then you can say you're satisfied with the train itself, since it's outside of the MTA's control.