This is old now... and we'll rather want to forget, but anyway ...
About the hate:
1. It is not so much about the movie itself as how Sony, the director, the producer some cast members and their cronies have been insulting critics. Name-calling. If you think US politics is bad now ... these people were the precursor.
The low water-mark was when after a Youtuber said simply that he was not interested in seeing or reviewing the movie that several of the directors' friends started posting slurs against him calling him a woman-hater among other things and even insulted his wife for having married him.
2. Lots of criticism against the trailer when it came out. It was bad. Shoddy workmanship. Worse than the movie, from what I have heard. Most legitimate criticism in Youtube comments to the trailer were deleted by Sony, but leaving comments from *******s thus making it seem like most criticism was unfounded.
3. People are generally angry about remakes of classic movies. Nobody asked for this. The original holds up, is better and has more charm.