They're not, and engaging in prejudice puts you in the same camp as those you think you're generalizing against.

Not all are, of course. Hopefully it's a minority. However, in my experience it is a factor that many less-technical people are ungrateful and rude even if I spend hours giving them free tech support. I suppose because they expect niche privacy tech to 'just work' more easily. After experiencing that hundreds of times it can become difficult to not become jaded.

Unhelpful?

I provided directions for reviewing the settings, which this person could have simply looked up by visiting the link in the title.

Rude and condescending? That's subjective, but maybe yes it might have been rude and condescending. Oh well.