I think honestly the reason I get so absolutely frustrated with those threads you're talking about (the, "I'm not going to listen to what you have to say, I believe I'm right, even though I asked for help"), is because, as someone mentioned earlier, lives are at stake. Yes, they are "just" fish, but they are living, breathing organisms. They feel pain, they feel stress. And I will admit, I am the biggest bleeding heart out there, but I think everyone here who is experienced and has gotten attached to their fish, learns to love them and care for them and look out for them. But when someone blatantly disregards advice, no matter how calmly, rationally, and eloquently it's said, and you KNOW their fish are going to suffer miserable short lives, it hurts.
It hurts because if they would just LISTEN, and do one or two minor things and stop doing others, it could be fixed.
I've learned to just breathe deeply and move to another thread, and not to bother posting. I can see where it's going and that just makes me sadder.
I know what you mean, the 'weird affirmation'. Like they need to be told they're right, even though someone will over 40 years is specifically pointing out the flaws. I mean, what could a dozen people with decades of experience POSSIBLY know, right? Let's just ignore them because I know I'm right, even though all my fish die within a week.