The title may be a little confused so I'll explain better here.
In my opinion kpop music is judged by kpop fans based on who released the song, not if the song is (personal taste) good or not. It's a thing that happens since forever and nowadays it took a turn to the worse of the worse.
The music can be super good, full of great vocals, rap, etc.. but the first thing some kpop fans say is: "oh, i don't like x group type of songs", "x group try so hard that I'm just unamused"...
I'm not saying people are wrong doing this, but this just pretty much proves that judging the quality of a group you don't like isn't judging fairly, it's just being negative biased. And my most perfect example of this is: BOP BLOP FLOP threads kkkk.
On some faves release: few lines, being always positive and always trying to enlighten the good parts of the song. On others groups releases: starts super negative, write essays saying what they would "change" in the song, saying they "expected more" etc... ...
Unfortunately this cycle won't die anytime soon and it's funny how hypocrite some are. Anyways, my point is: quality doesn't matter in some cases ..