This. Koreans have always praised her songwriting, they always seem to resonate to Koreans and are the main reason why they're so successful. If you're not Korean or don't have a Korean explain it to you, it's hard for non-Koreans to understand and appreciate it.
It's not surprising seeing I-fans hate on a young, successful woman. Once I read the lyrics for Blueming and saw someone explain it, I learned to appreciate her songwriting alot more.
The main reason why Celebrity is so successful is again, because of the resonating lyrics telling you to love and enjoy yourself. Also her use of songwriting is really good, and these lyrics/message are really helpful during times of covid.
It is not really easy for i-fans to appreciate her lyrics since she bases her lyrics on years of Korean tradition which does not get translated. She even shows some hints of Buddhist philosophy in her songs. (She has no religious following but grew up in a Buddhist household)
Since Lee Jieun mostly writes songs for the Koreans, and only occasionally tries to relate with the i-fans like Celebrity, most foreign fans will never really appreciate her no matter what ; the i-fans who follow her are doing that because she is famous