How to downgrade from iOS 17.11 to 16?

Hi, how do I delete iOS 17.1.1 and revert back to ios16?

I updated not thinking and this update is absolute trash. Stuffed everything up and my phone is all janky now. I know I’m not the only one as I don’t think I’ve seen or heard of any good feedback in regards to this update. The update changed all the interfaces on calls and texting etc and is just overall the worst.

I want to revert just can’t figure out how to do it.

please help!!!

[Re-Titled by Moderator]