What do you think is the reason why Oh My Girl is getting less popular lately?

 They've been maintaining their popularity which has risen since Queendom (2019) up until Nonstop, Dolphin, and Dun Dun Dance (2021).

They ranked quite high in the music charts (#26 in The Annual Charts), their videos on Youtube reach over 1M views, and Arin became the model for BYC and even a music show MC.

But I feel like their popularity dropped out of a sudden?? Their popularity was raising like stairs, I thought they could maintain it for a long time if they were consistent. I expected them to be popular just like how popular SNSD and Apink were in the period of Gen 3.

What do you think is the reason behind that?

The songs by girl groups who are 7 years old and older that have won #1 in public TV music shows

10 years old:

Why So Lonely (Wonder Girls) (2016)

Dumhdurum (Apink) (2020)

9 years old:

Lion Heart (SNSD) (2015)

%% (Apink) (2019)

8 years old:

Mr. Mr (SNSD) (2014)

I'm So Sick (Apink) (2018)

7 years old:

I Got A Boy (SNSD) (2013)
Damaged Lady (Kara) (2013)

Crazy (4Minute) (20130
4 Walls (Fx) (2015)

I Like That (Sistar) (2016)

FIVE (Apink) (2017)

Psycho (Red Velvet) (2020)

pann

[+249][-14]

1. [+520][-1] Because Gen 4 started and amidst the intense competition among girl groups, they barely make any comeback in 1 year. I think the fact that Real Love is not a really good song also plays a big role. 

2. [+359][-2] They don't release songs that are as good as their previous songs were. They lost to the new girl groups. 

3. [+309][-2] In order to be popular, you have to have a good song. Their comeback this year was so-so. And we all know that female idols rely a lot on the public's recognition.

4. [+239][-9] They've been recycling their concept way too much. Real Love MV looks so f*cking similar to Dun Dun Dance MV.

5. [+193][-2] Girl groups do have big fandoms too, these days. But just like what the other comment said, female idols still rely a lot on the public's recognition. Oh My Girl made just one comeback in a year. Arin, who is mentioned on the post, doesn't really have any personal schedule after she quit being Music Bank MC. She also barely starred in any drama this year, not to mention that the viewer ratings of that drama were so-so.