i would suggest whatever you would like as a good app
If you're talking about like people obsessed with South Korea like their 1st cousin Weaboos, then just avoid them, change the topic, or just straight up tell them that your not interested in their obsession of South Korea (In a nice way...) I know it is probably hard with the 2018 winter Olympics and all...
Good Luck.
I think it might be tetradic but i’m not certain. i hope this is at least slightly helpful but i’m sorry if it’s not
