No, it's not about grammar. It's about nitpicking people's posts. If something they claim in a post is disagreeable, then that's a valid argument to discuss. But if you want to tell someone to fix the grammar in their post, it's hypocritical to fight back so tenaciously against our own criticisms of the way you post. They're not both about grammar, but they're both nitpicks.
Aeris, Tats, Simmonds, Zonoro, and I can all be named off the top of my head. My sister also finds your posts annoying. We make up the vast majority of current activity in the forums besides you.