Siri is terrible, but have you tried Google Assistant? I find it very accurate at recognizing my speech and very fast. It feels like a vastly superior product and I definitely find myself using it on my Google devices.
Google Assistant is pretty good. But Google's on-device voice transcription in GBoard (unsure if it's a Pixel exclusive) is borderline magical. The delay between speaking a word and having it appear on the screen is shockingly short.
Oh yeah, the transcription is super good. I'm so sad it is crippled on iOS by requiring some weird app switching to work. Except for that part, it is super faster there too.
Yeah, came in to say this. Google Assistant has consistently gotten better year after year. I'm surprised it understands me sometimes.