It's funny how people keep protesting that Chaeyeon is the center of attention. It's common in kpop guys, even though yes, it's unfair.
Look at Taeyong of NCT U, Krystal of f(x), Hyuna of 4minute, Suzy of Miss A. They got the most attention because they're either visual or the most popular in the group, and their company sort of used them for promotion. So yeah, chill.