Yeah, I guess them losing their top songwriter BEP really hurt them in the long run, I guess that's fair to say after the results of the past couple of years.
But hitting #1 depends on more factors, like how strong the other charting songs are you're competing with at a comeback: there are many songs that are regarded all-time greats that still didn't hit #1 when they came out, for the simple reason of the competition being intense.
Twice’s last hit in Korea was fancy which was 4 years ago