alright girl, LOL first of all, I seriously hope you have watched and looked at the subbed versions of the diss battles from other teams because the other members of smtm dissed each other pretty hard, like in andup and microdot, as well as the aomg members with the yg group members. the nature of the diss battle, as even the producers mentioned, is that you write the lyrics in hopes to make it more exciting and fascinating to watch. black nut's rapping was pretty spot on, with him dissing GD with his marijuana as well as the iKon group or whatever. that's the point, the GENERAL point of diss battles is to make the receiving end uncomfortable! he is definitely not uneducated, because well, have you listened to his other songs? he includes a technique called "punch-lines" in probably all of his songs, and they are really spot on if you analyze them. there was a one about him labeling himself as "B" and how Minho should run away from him because he can't 'Block' 'B.'
what i'm trying to say is that you shouldn't judge him in such a fashion. sure, people accept things in different ways and I respect that, but really, don't be too sensitive about something like this. I've seen worse actions done to other rappers with total disrespect. and again, that is the point of them.