As someone who used to be a Beiber fan, never got around to removing the spot from my list, I saw this 質問 and wanted to answer.
Since this is his spot I'm not gonna be outright hateful, but I will answer. I no longer like JB because of some of his actions--like 書く what he did in Anne Frank's ledger, the DUI, peeing in mop buckets, spitting on people (fans included), 表示中 up late to his own concerts, etc.
I used to like him because he made catchy songs and used to be a decent guy. But I think the fame got to him, occasionally he makes a catchy song but he just doesn't seem like a nice guy.
I also just can't be a ファン of someone who seems to take ファン for granted. I'm not going to be a ファン of someone if they repay (for lack of better words) me によって spitting on me and 表示中 up late to a コンサート
I paid for.
And just another thing that really got me was that he legally changed his race to African American. Like what? He is neither African nor American. Don't believe it;
link