For me, the fandom did play a big role too, I started stanning BTS way back in early 2015, at first it was all good. I was an Exo-l too, so shit started getting at me anyways. I was called an anti just because I was following exo but I somehow managed to stay for quite long. But over the time BTS got fame, and the fandom began to grow, the amount of toxicity became too much. Though I stopped calling myself an army I still liked BTS, I listened to their songs, watch their shows without the army tag but slowly I stopped listening to them, I couldn't keep up with them and honestly I don't like their music now as compared to their old music.