Siri/Speech to Text.
Why does it seem after every iOS update Siri and the Speech to Text gets worse and starts messing up everything I say?
You may get better and prompt responses if you may kindly provide the iPhone Model that you have and the iOS version if it is known to you and re-post.
With the limited information that you have provided, It is hard to even guess the problems faced by you.
You may get faster and better responses to your query by --> Writing an effective Apple Support Commun… - Apple ...
Please re-post with detail so that someone else can help.