Why do so many people hate chair?

There aren't "many" people who hate Chair. It's that the minority of them are still very amargo, amargos and try to bring Chair and their actors down (which is ridiculous) every chance they get. Their arguments, despite being debunked again and again, are very repetitive and frankly, disturbing. Anyone who use abuse to argue against a fictional couple when the opposite has been proven many times is just using the issue to apoyo up their ship. Chuck and Blair ARE unhealthy at times. tu cannot find a Chair fan who will deny this. But they've also been shown time and time again to grow individually and together. Their journey has never been easy.. but they have loved each other through it all. So the hate is mostly just the opposing ship being amargo, amargos about their ship.

Well, not just because of dair, me for example, I stop loving them in s3 (before dair happen), there's a lot of reason, but bottom line I think most people hate them because of this:

media.tumblr.com/tumblr_m4607mmqLH1qbm2lw.jpg

And if tu want to know from media/critic's point of view about that topic, tu can see it in here:

arakha.tumblr.com/post/5231364543/media-and-fan-reaction-to-josh-safrans-not-abuse

I know that some people disagree and chair together in the end, but even happy ending didn't erase it, for some people chair will always known for their unhealthy relationship and a measure for what they don't want in their own relationship. Oh and I will put one más reason (I don't know if people who hate chair agree with this)

their plot was a mess, even in the end when they got married after witness his father's death (and they didn't do anything about it), that was insane , I don't think it was romantic at all, in the end the only thing I like about chair is they got cute kid

Well, I hope this answer your question

Dair has nothing to do with this, yes I loved them but I always had a huge problem with Chair. I've always hated the way Chuck treated Blair like someone not fit to wipe his shoes, and this is the woman he supposedly loves??? How many times has he abused her physically o emotionally? Once he traded her for his hotel it showed how little he valued her. I could never, ever believe he loved her after that. And even in the season 5 finale he treats her like crap making her feel she's less important than his hotel and IMO the only reason he married her was to stay out of jail más than any amor he might have had for her.
Also, I hate that blair turns into this weak, pathetic, I can't live without a man, woman when she's around Chuck. She takes his abuse día in and día out without standing up for herself. Seriously, what happens to her strength when Chuck is around? I don't even know o understand why she loves Chuck so much. Is it because she is so broken that she doesn't believe she deserves better than him? IMO, Blair is the typical broken, abused victim that can't get away from her abuser as hard as she may try because after all this time she's come to believe she is how he sees her.
For me Chair is one of the most repulsive, abusive couples I've ever seen on TV and can't believe that after all the *&^&* Chuck pulled one her she still ended up with him.