It's perfectly normal for people to talk about clothes or hairstyles because they just gave us pictures. What else are we going to talk about anyway? Some likes what they see, and some do not. This is also perfectly normal and people are free to express their thoughts. So I agree with @Queeeenie it was not nice for OP to call names other fans just because they didn't share the same thoughts with them.
In Dynamite, the suit weighed heavily because it was a periodic song. If Butter is a similar style song, it means that we will see suits frequently. Generally, because BTS offers so many performances, too many suits are prepared to avoid repetitions and naturally some of them are bad. And it's okay to point out that it's bad. This is not a criticism for BTS, some of you realize that please.
Also, a criticism above asked why they are wearing a suit if it is going to be a summer song. It's a logical question. But I think Butter might not be a song planned for the summer. If they're really making a comeback like July, we can get the original summer song as the title track for the new album. So I think we should wait to hear the song first.