Did anyone's iPhone 6 slow down and become dysfunctional when new software iOS 11 downloaded in spite of Apple Technicians intervention of stripping and reloading? Did anyone get theirs running well? Did this cause you to buy a new phone?

iOS update

Yes. So you have to buy a new phone.

Yes...totally slowed down and yes I am buying a new phone....not sure what type. Very frustrating

Yes. Then started randomly shutting down with Apple screen displayed until finally died altogether

Yes yes yes. It is not opening different apps and not responding to volume within apps. Forgot I downloaded the new update until just now. Darn it Apple. This is very user unfriendly!