In reply to the power:
> (In reply to sparkass2)
> [...]
>
> indoor climbing seems to atracted them
Now, I'm not trying to absolutely defend people who are actually unpleasant, but some people train for climbing, and training is not always about having fun.
When you are pushing yourself hard, you have to be focused. And when you are focused and just fail on a problem/route it can be very frustrating and that frustration sometimes erupts vocally. And just because someone isn't all smiles during their session doesn't mean that they don't go home satisfied.
I'm aware that it now sound like I am one of the people that the OP was criticising - I hope I am not unfriendly, but equally I know that when I am pushing hard sometimes I have some of the characteristics that the OP derides.