2. A rookie GG, Aespa, is the Group in 2021 who release the more soty material songs among Idol groups
I don't really understand why some people always insist on Aespa being rookies to say Next Level's charting was totally unexpected. Did people forgot that Itzy's debut song was the second most successful idol group song released in 2019, that BP got PAKs with Whistle and that Playing with Fire was a hit in Korea? Cheer up was also Twice's second title track and yet their biggest hit in Korea. I don't see why the fact Aespa are still rookies is supposed to make Next Level's performance more impressive.
3. Somi out of nowhere is performing better than other well establish soloist like Chungha, Sunmi etc...
Chungha has not been performing well for several releases. And Somi is not coming out of nowhere, her previous songs also charted on Melon even if not as high.
4. the collab that a lot of people dreamof for years, Akmu x IU, 2 good artist in chart usually isn't performing as well than everybody would have suppose
Akmu's previous song did not chart well so I think there was some doubts about how that song would be performing but it's doing well.
6. BTS latest song isn't doing as well than their previous release, being block by other "smaller artist" compare to them like Mujin, Taeyeon , aespa etc....
LOL
Apparently you are talking about PTD but it's not even a title track, nobody was expecting it to perform better than Butter. We did not even know if the song would have a MV or not until like a week before it was released. It's currently charting higher on Melon than Taeyeon's song by the way (a "smaller artist" as you said who has already released big hits like Four seasons but let's call her a nugu to downplay PTD's performance).
8. Gfriend disbanding when no one thought they would
It was their last year of contract, there was no news of renewal but yeah absolutely everyone was sure they would not disband. Gfriend's disbanding felt sudden and was clearly not handled well but saying nobody was expecting them to disband is really surprising. I was really wishing for them to continue as a group but was worried to not hear news about their renewal or about a new comback so even if it saddened me a lot, I was not that surprised.
I guess disagreeing with OP will mean I attack them according to some people.