Sooooo I don't love Rey as a character because, quite frankly, she's very boring. Her motivations are all over the place and never fully flushed out, she has this obscene amount of power without ever having been properly trained (and I don't attribute that to 'talent', Anikin has talent and he still went through over a decade of proper jedi training), she seems to weirdly care about things she has no business in, I could go on.
I don't hate her by any means, I just personally don't think she makes much sense. She feels more like an idea than a fleshed-out character, and more like a photo than a home video, if that makes sense. Do I think she's badass? Yeah, I do. Do I think she's interesting? Not really.
But doesn't it all come down to opinion? My BFF loves Rey more than any other character, and that's fine. It's all on a personal scale, anyway.
Now, if someone dislkies her solely because she's female, then they can stick it where the sun don't shine, but I haven't met any of those people irl.