Why do so many people hate Justin Bieber?

you all being distracted by a curse called "subjectivity"
"those men hate him because they will never get as many girls as he does"?
oh brother that's your own perspective not theirs, you cant summarized every single person like that, if you think that the haters were solely consist of young mens then you're just a frog who lived in a cup, they were also adults who sees things differently. And things like "if you dont like it, then dont ever listen" crap like that..... how can we "not listening" him from media? when they all soared in our environment and we can say that we are "controlled" by it.
Admit it or not most of the haters was men then what? your opinion was all biased, men or not you cant over generalized the reason.
and what's with high pitch voice and pretty face? since when that sort of things can determine the sex?. he was a human, yeah that was right, and dont forget he's still young, but when you starting a life like that, do people really care?, do people care if you got stuck in some mess and cant perform fully? dont ever hope about the people to follow.

it was just natural a star got so many fans and haters, but then the frequency and media's propaganda manipulate the natural stream. Good point or bad point, both of them can boost someone's popularity in showbiz. and when you hate it, you'll see it everywhere. You like it, you'll see negative response from people. so stop thinking "i like him, so he was never wrong or make a mistake", or "i hate him, he's a total jerk with no good points" like that. we're not talking about Justin here, we're showing our own ego

The first thing that severely bothers me is that he does not write his music; others write it for him, since he most likely has no real compositional skills whatsoever. I wouldn't be surprised if he spends more time thinking about his hair then music. That said, I'm sure music is not the first thing on his mind, which it should be, if he really is a "musician." This is the main reason why intellectual musicians do not like him, not to mention he doesn't know a single thing about music theory or have any deep musicial knoweldge. But that's beside the point.

Second, his ego, obviously. The thing about having an ego is this: if you are actually correct in saying you're the best at what you do, then you're telling the truth (the question then is whether or not you should show your ego at all regardless if you are correct about your skills, since society does not like people with egos). As for Beiber, the outcome of his abilties blatanly reveals how he is not all that people believe him to be, and the fact that he most likely believes that what he does is spectacular points towards his ego. If he actually were as skilled and gifted and dexterous as teenage girls claim, then Beiber haters would not care much of his ego, but since he clearly is not skilled, gifted, or dexterous, by any musical standards, his abilities have been falsified by his fans and himself, and, therefore, his ego is unacceptable to his critics.

Third, take the fact that he, his management, or his fans have compared him (in some way or form) to many great musicans who are light years ahead of him (this is undisputable once you see who I mention) and will always be, people like The Beatles and Michael Jackson Kurt Cobain. If someone actually and fundementally believes Beiber has more talent than the above mentioned, then that is horrifying. And this is coming from me, someone who loves a wide range of music from classical to heavy metal to flamenco to jazz, etc, etc. Heres's the biggest thing I've noted about Beiber: all of his fans, at least all of the ones I have ever met (which, believe me, is A LOT, unfortunately), have no knowledge whatsoever about music. What I mean to say is that I have never met one musician in my entire life that likes Justin Beiber, but I have met plenty and plenty of people who are not musicians who love Justin Beiber. That said, I am happy to say I've also met many people who are not musicians who dislike Beiber, which means they can see clearly through him and his status.

Thus, the heart of this epidemic of Beiberdom is the reflection this has on society (meaning, teenage girls, for the most part). To me the weirdest thing about all this Beiber stuff is that people (again, teenage girls, mostly) have allowed him to shoot to fame. And for what reason? Because he's attractive? Well, great, but that has nothing to do with music. I'm sure if Beiber's face were to be damaged in some way, some girls would stop listening. I still have met one person who likes him strictly because of his music, with no other factors being an influence.

I could go on and on, but I'm going to end this now since it's getting long. Hopefully that was "with a sense of maturity"!