Siri is sorry she can't help, misunderstands things, or straight up ignores requests way too often.

I will say that the non-display Google devices are often more helpful than the ones with displays. The displays want to show you stuff, but the non-displays will tend to give you an answer.

e.g. "what time does walmart close" will respond with "there are several stores in your area" and then show you a list of stores with their hours, but the non-display devices will just reference the closest store and tell you when it closes.