Using Siri is perhaps the most annoying part of the Apple ecosystem. Specifically, the voice-activated assistant features seem to get in the way more often than they are helpful. (No, Siri, I didn’t want you to show me a preview of Google results for a question that was tangentially related to what I actually asked. I’m terrible at Googling.)
Disable These iPhone SYSTEM SERVICES Now! [Ultimate Guide]
If you'd rather disable Siri altogether, regardless of your specific issue with Siri, here's how to do that.
Listen to "Hey Siri"
Press the side button for Siri