What the majority of the people in the world can't take.
Let's use music as the criticism here:
Criticizer: Personally, I think your vocal range is a bit limited.
Person Who Can't Take Criticism: ppfft stfu u cant do better at all
Criticizer: Does that matter? Since when did pointing out another person's flaws mean you had to be better than that person?
Person Who Can't Take Criticism: always
Auto-Tune is a proprietary audio processor created by Antares Audio Technologies. Auto-Tune uses a phase vocoder to correct pitch in vocal and instrumental performances. It is used to disguise off-key inaccuracies and mistakes, and has allowed singers to perform apparently perfectly tuned vocal tracks without needing to sing in tune.
Almost every artist you've listened to uses this.
Practically every artist you like uses this.
But of course, most stupid people only point out auto-tuning as a negative thing for singers they dislike, whilst ignoring that the singers they like are equally as auto-tuned.
Person 1: Hey, did you hear that new Ke$ha song?
Person 2: Nah man shes autotuned leik fuk
*Person 2 later listens to equally autotuned singer but doesn't complain about it*