Its sad, it could be a great clean movie with cool action, but it isn't.
The swearing is completely overdone, the father swears, the son swears (and he's only like 10-12). Their relationship is lousy, the father doesn't love the son, and the son is completely rebellious to the father. Later on the father kind of tries to tell the son he loves him and they kind of become friends, not really a father-son relationship, more like friend-friend relationship. The son never repents of his rebellious attitude/actions toward the father.
The fighting scenes were good, but really you need like TVG for this movie, if it works. The story is kind of like the movie Rocky but with a twist.