So I have been having discussions about why Vpop groups are failing. Specificially idol groups. The people I spoke to came with a couple of reasons. One is the viet language do not fit with the style of Kpop. Another thing is vietnamese prefer music that are gentle, chill and have meaningful lyrics. It's not that they hate groups. They enjoy Da Lab, X2X and kind of a group Spacespeakers. All them three has huge popularity and high views.The netizens if a idol group wants to succeed, they have do like what 365daband, The Men and V.Music did back in the days. Backstreet Boys style music-pop ballad songs.
I think any new idol groups should go that route when they debut. When they established themselves with the audience, they can take some detour of their songs that has a more upbeat vibe. Similar to what Soobin Hoang Son, Erik and MIN does. They do ballad songs to gain the mass audience support, but the same time release songs that are more liked by their fans.