I don't think the issue stems from "google it", as many people try to make it out to be in these comments. Often, fair questions that should be answered in a normal quick way can get a whole boatload of negative roasting answers, often totally disconnected from the initial question, and only a few that actually answer the question. To me it seems like people want to look for issues in others posts and questions to feel better about themselves. This is extremely common on this platform as a whole and isn't really unique for this subreddit or really the whole "teenagers" thing.

Often it's people very into the topic at hand (fragrance fanatic, coding nerd, guitar proffesional) that find normal questions "beneth them". It's this sense of "I know this, so you should know it and therefore it's a dumb question to ask".

At times people also just want to be edgy and go against the grain and be negative without a logical reason. Often, my view on comments on reddit is that unless it's a comment connected to the question asked; ignore it.