You mis-spelled “insufferable”. There is an Ultralight website, I sometimes peruse it for comic relief more than anything. One of the more hilarious threads, the guy who runs the website I think, something like that, is totally blind.
He went on a solo backpacking trip. You’ll never guess what happened!
Difficult as it is to believe, he got turned around and lost off trail. All of the website members were giving updates on the SAR operations, but dancing around the rather obvious fact that going solo off into the wilderness if blind may have not been one of his Better Ideas. Younger generations have this weird thing about never criticising anything, at all, no matter how stupid. Even broaching the subject in a rather anodyne way was met with apoplexy. LOL.
Yes, I could not think of the correct word so I finally just settled on snotty as an inaccurate approximation.
As for millennials not criticize each other, I dunno. Maybe it has something to do with an education fad that is currently in vogue.