Writer/director BenDavid Grabinski tells IndieWire about the surprising complexity behind his time-traveling buddy comedy. BenDavid Grabinski has written for television, film , and video games, and no matter the media, sometimes the answer to making something better is to make it a little bit dumber.   Well, dumber isn’t quite right — and is only meant affectionately by Grabinski himself. The writer recently partnered with Bryan Lee O’Malley on “ Scott Pilgrim Takes Off ,” the alternate