Eh.
Here's the thing though: I don't have to RP. Between the many books and TV shows everyone keeps telling me I need to read/watch, a flexible work schedule and a semi-active social life, RP for me isn't a necessity, but an option. I am an introvert, and I enjoy my own company. I like writing, and view RP as a creative outlet for that hobby, but if it's not satisfying the itch I most want to scratch I can just write on my own and I'm happy with that, or I can stick to a small, select handful of RPers whom I know are always guaranteed to be a good time.
I don't see why I should adjust my expectations or lower my standards, ever or at all. My standards are high because I value my time and patience. If I'm not getting back the same level of what I feel like I'm extending myself to give, I don't feel the need to consider that the problem is with me, because I can just go and get it elsewhere. Or do something else.
Cries of "elitist" have always annoyed me far more than the recipients of that label. And you know what? Sometimes I've been on the other end of things. Sometimes people have looked at my stories and characters and RP and been like, 'not for me, thanks'. To which I shrug and say, OK, bye, because again — my ability to have a good time does not depend on one person's interest and approval.
If they're loudly complaining about the perceived inferiority of everyone around them? Sure, they're an arsehole; they're sucking the energy out of everyone else who's here having a good time and they should just go, live their best life with people who apparently meet their expectations.
It's perhaps the negative, whiny, soul-sucking narcissists you meant to target with your posts, but I don't agree with the conclusion that people just need to be more accepting to be happy. I'm never happy when I lower my expectations to just extend myself to anyone and everyone who wants a piece of me — nothing makes me burn out and hate myself faster.
You don't have to announce your preferences and use those to shit on people. It's a similar precedent to the one espoused on that dating thread a while back. It's the equivalent of having something ultra-gross like "no fatties" on your profile. But having those preferences? It's fine. I think shaming people for that is just as bad as shaming people for just about anything else.