Well first of all middle finger for haters. Its not actually about hacking, so what its a damn good entertainment. It keeps you interested till the end, never miss a beat . This movies will be one of "must watch" in the future.
The problem with these critics, is that they always look for Oscar material. The movie with compassion ,humanity, blah blah blah, which is most likely a boring over long box office turkey. Whats wrong with entertainment, that's what movies are for.
Watch this movie, you will definitely like it.