I think you should realize that Listeners are regular people, old, young, experienced, and not. Some find it awkward and nerve racking to be a Listener for the first time.
They're not professionals which is stated time and time again, so they're not obligated to perform any certain way but to lend an ear the best way they know how.
I understand that as a Venter a warm greeting is probably expected, but again, they're not therapists, they don't have to greet you any which way if they themselves are just as nervous as you and don't know what to expect.
So yea, asking them to "step up their game" is a bit presumptuous. This is not a "game", it's a free volunteer service from normal people. That being said, not all listeners are the same, so to say "Can listeners step up their game" just because they don't ask "how are you" is a bit rude by disregarding the many others that do.. Also, I mean that's pretty much a stupid question considering they're there to vent, so obviously the Venter is not doing well.