I've heard similar things about the line-by-line nitpick style, which originated on Usenet and now flourishes in places like Reddit. It got even worse when people learned to name-drop logical fallacies. But pockets of intelligent discussion always exist and a genuinely curious person would do better to find them, which is easier today than ever thanks to the internet. Why spend your time trying to fix stupid discussions? It's a thankless task and might make you stupider as well.