Why can't you just swipe downward and hit the toggle?
I had to do it pretty often when my phone would log into the "XFINITY" wi-fi instead of my home wi-fi.
If you need it off permanently for some reason, you could also go straight for settings > wi-fi > Off which is fewer steps and no need for holding a button down.
Also, as mentioned in another comment, there is also the Siri option which would be the quickest.
Two-Arms t1_j9w42hq wrote
Reply to Turning off Wi-Fi or Bluetooth is a pain for no reason whatsoever. by Krugen7
Why can't you just swipe downward and hit the toggle?
I had to do it pretty often when my phone would log into the "XFINITY" wi-fi instead of my home wi-fi.
If you need it off permanently for some reason, you could also go straight for settings > wi-fi > Off which is fewer steps and no need for holding a button down.
Also, as mentioned in another comment, there is also the Siri option which would be the quickest.