I suppose you are right in a way though to expect nothing from people and you won't be disappointed.
It sounds like you are putting words in my mouth. At least let me rephrase it then.
you his help (i.e. "be careful what you take for granted"). So, yes, set your expectations accordingly. I've chipped in and helped newcomers, and on occasion I've felt charitable and done virtually all the work for them (taking the extra time to explain how and why I did what I did in excruciating detail in hopes that they would learn and be able to help themselves next time around).
I've been making an effort to be polite and understanding and to not take your criticism personally, but now that you've addressed me directly: There are lots of helpful people here at RHDN and the community is usually polite and friendly. It's pretty rude to complain to these same people about how they're unfriendly and unhelpful, which is why I'm surprised this thread wasn't locked right out of the gate.