If this was a significant issue, this, the worlds most visited forum for all things iPhone, would literally be blown up with people complaining, yet it's not. The tech press would be all over such an issue, but they're not. That leaves why when there are millions upon millions upon millions of other users out there who are seemingly not having issues either, why you're having an issue?
I gave up using Siri because it can't understand most of what I say. My friends who have iPhones don't use it because it doesn't work for them either. None of my iPhone-using friends have posted here about it (or, indeed, anything), they just assume it doesn't work because everyone they know says the same. Not everyone who has a problem with their phone posts here so a lack of posts certainly shouldn't be considered to be a minor problem.
The only person I know who uses Siri has a Homepod for which she has managed to learn to say half a dozen commands in way that it can understand her and when she uses it it's like she's speaking to a small foreign child.
I assume it's because we're not American; we're from the south-east of England and our accents would be regarded as pretty standard RP. I stayed with friends this summer who've got a Google equivalent of Homepod. I had no trouble using it just talking to it normally, so I don't think there's a problem with my comprehensibility.
Edit: interestingly the friends with the Google gadget use iPhones, iPads and Macs. The only non-Apple tech in the house is the Google gadget. I'll have to ask them why - but I can guess.
