This film had a lot of potential, we know that because it's an idea we've seen executed well many times before. It could have been so much more, it wanted to be so much more. Unfortunately amateur camera work/blocking, poor script and horrendous sound design really rob this film.
When will sound designers learn, if you make the score significantly louder than the delivery of the script, foley, etc, through volume, pitch or otherwise, you destroy the film. In John Henry the score which pops up regularly and randomly (often out of context) is at least double the loudness of everything else going on. That means you either listen at a volume that makes speech inaudible or you blow out your ear drums when trumpets suddenly start blasting.
That leads to much of the speech being inaudible. Not that it really matters with such a basic plot, but it definitely is frustrating. The John Wick dead dog scene is ridiculous, and at no point is there emotional attachment to any of the characters. Heck, for most of the movie you won't even really know who the characters even really are.
Better to save your money and watch Shaft or John Wick instead.