Where do you fall on Margaret (2011)?

Love it.

Apparently this is a true "love it or hate it" movie. I'm now even more interested in seeing it.

I saw Manchester by the Sea today and thought it was pretty safe and conventional, what on earth could this movie do to be so polarizing?

Speaking as someone who was pretty meh on it (although I'm also meh on Midnight in Paris so maybe I'm an outlier to your theories), I can see the "hate it" camp largely being due to how downright miserable some of these characters can be.  You have the I'm-feeling-everything-at-once main teen who could be easy to hate given she's a wealthy, privileged New Yorker constantly bitching about how the world has problems that still come around to being about her, then you've got the supporting characters whose lives she makes hell for much of the film: the actress mom who's also self-centered albeit to a lesser degree, the friend of the dead woman who might be the most likable character in the film although she has her moments of annoyance (like not letting the lawyer talk because she somehow doesn't understand the most rudimentary legal concepts), her best friends that she keeps playing hot-and-cold with, the father who could pretty much be absent from the film if it weren't for it being Lonergan playing him, the bus driver that she let off the hook until she had an attack of conscience, the too-cool-for-school loser she lost her virginity to that annoyed me every moment he was on screen, the Syrian classmate that she constantly berates because she can't stand a differing opinion, Matthew Broderick just being there (though the scene about King Lear might be my favorite one), and Matt Damon playing the most passive human being on the entire planet.  Unlikable characters are fine, but it can be an issue if the characters aren't interesting and when the only one given much depth is also the loudest, whiniest bitch of them all, I can see how that can be an issue.  Then you've got the long runtime including multiple scenes that, while I could probably find a way to defend their inclusion if necessary, could easily be considered needless and a lot of more interesting themes going on in the background as we're mainly focusing on this one teen being told over and over again how she's not the center of the universe which is not new and depending on your individual taste not all that compelling.

To be clear, what I said above is not my own full thoughts on the film (I found enough things interesting about it to not hate it) but more my idea on where the hate can come from by exaggerating my own criticisms of the film.