Simon Kinberg vs David Goyer- who's the bigger hack?

I would say its a bit of an asymmetric situation. A hack produces bad movies because they are just cashing the check and thus are indifferent and sloppy. Not every bad movie is hack work, however, and not every director who is just cashing the check is a hack, either. A hack is specifically a passionless director who produces bad work. If their work, despite lacking artistic passion, is still workmanlike and functional, then they aren't a hack. They just are a professional doing a job.

( Conversely, if they aren't passionless, but still produce a bad movie, they aren't a hack either. They are another flavor of bad director, like "inexperienced" or "ill-suited". )