don't know them when they were nugu but i only saw them while watching a red velvet fancam and listened to their music.
just watch those videos. you'll learn a lot on their real hardships and downplaying. legit nugu-ness.
they are not nugu now but the important take away here is that they were not pushed anywhere. there was demand for them.
people who are not even fans (as you can see some/few responses) in this thread still downplay them to this day.