Making shitty threads complaining about other threads/posts being shitty is an annoyance that predates 4-ch. It goes all the way back to Usenet and dial-in BBSes. Every generation has had their "remember when this community didn't suck?" meta shitposts (though many predate the term "shitpost") but they never have and never will contribute anything of value. I've been a part of many online communities and many of them make the same exact mistakes, year after year. And they think they're the only ones who have ever noticed it.