Why do some support mains act like they are immune to criticism?

DISCLAIMER: This is just my opinion of a few support mains, not the majority. If you are a support main and this does not describe you, then congratulations, this thread does not apply to you.

A lot of the time I will read threads on here and Reddit that give the impression that support players are paragons of selflessness for playing a role that doesn't focus around getting kills. This somehow makes them less toxic, annoying, angry, and a better overall human being than the average League player and we should all worship them.

Fine, I get it. Your role is to help the team win by offering utility, and that is a great and important role. But why does that simple fact make support players think they're better than everyone else? Support players routinely caricature their ADCs as toddlers and crybabies, whereas they themselves can do no wrong... for the sole reason that they are the support. It makes no sense. Maybe your ADC was right in going aggro and you were in the wrong for playing passive? Maybe your ADC was right in hanging back rather than following a bad engage from the support? Maybe the ADC is right in criticizing his support for the lack of ward coverage? In all of these instances, if an ADC legitimately brings up issue with the support's play, then he is automatically toxic, and the support is a victim. Why? Sometimes supports will leave lane altogether and make their ADC go 1 vs 2 in lane because the ADC brought up issue with the support's play. However, if the support criticizes the ADC, it's considered fine. It's a double standard.

Every other role in this game is liable to legitimate, constructive criticism. If my jungler doesn't apply any map pressure, I have a legitimate reason to criticize that gameplay. If my mid laner isn't roaming properly or at least pushing a lane while the enemy mid laner is roaming, I can bring that up. If my top laner is feeding kills rather than playing passive under tower, I can tell my top laner to hug turret and it's no big deal. However, if I tell my support to drop more wards or help peel the enemy tank off of me, all of a sudden they act as if they have been brutally insulted and then everyone on the team flocks to console the victim of this most grievous assault.

This massive sense of entitlement makes some support mains think that no matter what, they weren't the reason the team lost; rather, it's always because the toxic ADC, the useless jungler, the no damage midlaner, or the feeding top laner screwed it up. No, the game couldn't possibly have been lost because the support was just terrible at CC, warding, or using peel. Remember, because they are so selfless for playing support, they are immune to your criticism.

TL;DR: I love supports. Some support mains, however, seem to think that they are better than everyone else on their team for the sole fact that they are selflessly playing support. Step off the high horse and realize that you are no different from anyone else on the team.