The auto-tune was a very cool invention. If you can really sing, if you've got decent pitch, it can be carefully employed to help correct a slight miss in the studio or at a live show.
Real-time corrections for the occasional note that's a bit too high or smidge too low is one thing. Turning someone who can't sing into someone who can sing is something entirely different. Auto-tune is a safety net, not a pair of wings.
Cranking up a real-time effect like auto-tune ord throwing in a massive amount of reverb just doesn't make an awful vocalist sound any better. Please stop trying. Please.