I’m not sure why this film is so universally derided, apart from a few wooden performances it’s generally a well-constructed film.
The story is coherent, characters sufficiently developed and the fight scenes are excellent and varied. There is sometimes a little confusion as to who is who as murder victims all look very similar, but that is the point of the story.
By no means worthy of awards, Undefeatable held my attention for the full 90 minutes. There is far more good than there is bad.
If you’re a martial arts fan you should track this down. A credible effort.