I guess if the achievements are about the first 4th gen BG to get (fill in the blanks) or the first kpop GG to get (fill in the blank) in 5 years (you get what I mean), I think those can be dumped in the achievement section or toned down.
But if you get to break old records or make history as the first of (fill in the blanks) - then it definitely need to be posted in the main section. Those records are not your run of the mill records.
The problem is that BTS (yes we all know you’re talking about them) is doing it so often that it became normalised and people got annoyed lol. Just embrace it people, you will think back fondly how you were in the thick of things during the great BTS. And brag that to your children.
Its not just BTS, I think stuff like PTD going #1 is worthy of an overall thread.
But achievements threads are purely for the fandom, I would say NCT,BTS,Aepsa, BLACKPINK have the worse offenders, but in general. Like 99% of the threads are just filled with akorn farming.
The txt thread is nice cause all the fans can go their and see, and the MYs one aswell or the BUTTER thread. But people wanna feel special and have their own threads just start posting random twitter stats, that alls outsiders of the fandom can say is "oh thats cool" otherwise if its any sort of disagreement, its just called inciting/derailing and ya get banned.