Here's an example of how stupid Siri is.
I put the Siri watch face on my watch at 8pm last night. It told me the current weather on the main box, and the upcoming box afterwards it had "Start outdoor run". I was impressed, because at 5am every weekday I go for an outdoor run. So that's good, Siri is learning!
I wake up and the outdoor run is gone and has been replaced by reminders that are due at 7am. I don't use the reminders app, but these were created by the GoodTask app which I do use. But my run is at 5. So why are reminders at 7 now showing? Fine, I'll scroll down, the run will be there. I scroll to the bottom, no run. But do you know what's at the bottom below the reminders? A Stock update. I've literally never loaded the stock app, ever, on iOS12. So why is the stocks more important that the run?
FINE, whatever - I raise my watch and say "Hey Siri, start an outdoor run" (the exact words it had on the Siri suggestion) and it popped up "Install the Nike Run Plus app!". No, I own the Nike watch but the app is garbage! I want to use the standard workout app. But it's not letting me. FINE! I'll start it manually.
So I finish my run and then look at the screen again, and the top suggestion is "Start an outdoor run". I've just finished a run. Do you have the intelligence of a toddler? You see me doing a run and you say "Oh Akrapovic likes running! Why don't you do a run?" right as I finish a run? And then just as a test, I tap "Start outdoor run"...and it just opens the default workout app. It didn't actually start the run anyway.
Siri is just a toddler. It looks at something you once did, assumes you do it a lot, and then suggests it at random times. And when you do try and use it, it half arses the function anyway. Siri is so bad it's easier not to use Siri.