Not everyone hates Near. That's a blanket statement. I myself happen to like Near as a character and there's plenty of other fans. Also it's obvious why people do. Most people hate Near because they feel he is a cheap imitation of L They feel the same with Mello. Quite a few people literally dropped the mostra when detto SPOILER happened. (You know what happened and I do as well. Don't spoil it for others if they wanna watch it)
I didn`t hate Near, but it was quite a change after L that I wasn`t sure how to feel about. Like, I wouldn`t say that I hate him and he was totally fine, but I just wish the 'twist' with Rem would`ve gone a different route.
I don't hate him, he has his own personality just like any other characters If people hate that's only because they Amore L way to much and never bothered to give Near a chance plus people hate for no reason just to unisciti a hate fandom to be cool and shit