For me even after remapping controls to arrows it seems that A and D keys are binded to break free from the grapple attack.
You should be able to use something like SharpKeys to do that. It does on-the-fly keyboard remapping: https://www.raymond.cc/blog/download/did/805/
It`s very similar to JoyToKey which maps controller input to keyboard which I use with this game, since I despise keyboard controls lol: https://joytokey.net/en/