I have noticed it more recently in DF. People expect new content to go down on day 1 or the entire group is bad. As I said I first noticed this stigma personally with Weeping City when it first came out.
I hate it too man and my view to people who act like that is this. Respect that there might be new players entering and try to help them. As much as I hated getting Nidhogg on Trial and I do admit I did insta leave a couple of times due to not being in the mood for that fight. I did help people. I told them what to avoid, to soak and which add to focus.