Hinata is one of the least hated characters, what made you think she is hated?..
But i am certainly not a fan of her because of my own reasonings and i do not have to like her.
It is not about shippings or being a Sakura fan (which i am not), i think her characteristics is one-dimentional, she needs to care more about her clan, village, fellow comrades, her past is not horrific as people make out to be, she is not as strong as people think; and she is overrated.