I don't really care about who's in fault for those groups disbandment or who is in charge for that. Nuest and GFriend is a good group, nobody denied it. But what fans often forget that, Kpop is a business not charities that produced music to fans. So, if we trying to throw the sentiment towards the groups I think we all understand why both group get disbanded.
Nuest sales stuck at 200k after the acquisition, not really improve and they're already in their 10 years which I think why the company don't really bother to put an effort on them. They get their popularity after produce, and Pledis didn't using it well end up the group popularity stagnant and started to drop. Move to hybe, all their bg able to sells more than 900k and soon 1 million for each groups. And that's the standard for bg in hybe. Selling under 300k for bg may seems not good enough for them as that amount is good enough for other company.
GFriend sales never exceeded 100k. They also didn't show any significant improvement after the acquisition. And same goes to Nuest, their popularity stagnant and started to drop. As whole, Hybe probably didn't see them to improve and didn't want to keep investing in the group that will bring them no benefits. You can see the difference between GFriend and Fromis. Fromis on the other hand doing really well after move to hybe and their sales rose to 140k almost 50% from their last cb. To them, debuting new gg will giving them more benefits as those groups for sure will sells more than Gfriend. Especially they have Sakura and Chaewon that personally I think to save soumu and guarantee instant success with quick cash.
For those who don't know how these two company actually in debt for better reference because I'm tired that people unable to understand this from the business perspective.