AIBU to think posters who complain about stuff having already been discussed or not being in the right topic are just weird? It's such an odd thing to point out. I mean, we don't say, "we've already talked about what to do when you find your husband's secret Tinder account. YABVU! Please see previous threads on this!", do we? Or do we? "Someone's mourning over in Chat! Could you go and talk about your dead hamster over there? This isn't an AIBU!", or "I think you'll find 'partner sending dick pics to my sister' has been done to death! A quick search would tell you this!"
I'm all for pointing out a bellend when I see one, but sometimes people can be so pedantic on here.