And I know what they're talking about. I'll put it a bit more politely: You can't help people who aren't willing to help themselves.
It's a thing. When you start helping out people in forums or on irc or what have you, sooner or later you'll encounter people who either can't be helped or just require far too much energy. No matter how much you'd like to help everyone, you just can't. It happens.
I believe parent poster has already calmed down, but I can understand their feelings. It's frustrating sometimes!
The many people you are able to help make up for it though.