@hilde45 there is a way to be critical and constructive not condescending. Many of these comments however have the "I have the tickets to the best seats, let me lecture you how wrong you are" vibe. Of course you can't prove intent so you can always say that I am just imagining the vibe.
But it seems to be in so many posts: OP asks "how is A with B" and the answer is "oh, no, forget it, you need C"