Siri is really bad on many basic things that they could hard code. Like 'turn off lights' become 'turning on the the lights'. There are many weird ass bitflips for basics like that in Siri that is incredibly frustrating that alexa and google are significantly better in understanding reliably. Whats even worse is Siri could hard code these basics and not use ML which tends to work %90 of the time, but bitflips %10 of the time and leading to everyone here complaining about how bad it is.
Even worse, I think Siri used to work better 3 or 4 years ago.