Though, I'd say the film just powered thru based on the OngBak and related Muay Thai craze from that era and to appease the friendly dopey white Falang movie-goers. The film was barely about the main protagonist becoming a Muay Thai fighter. Maybe 10 minutes of the entire film was dedicated to the Muay Thai Giant. However, there are a couple of Muay Thai fight fight sequences in the film, but they are nothing to write home about. The plot is entirely nonsensical and is slow-moving. Around 4/5s of the movie we finally see how smugglers interact with the Muay Thai Giant and pals. The wait was not worth the payoff. It was fairly yawn-inducing and the method of "escape" was inane.
Furthermore, I know little about postproduction, though I know enough to say that the crew that cobbled this together made many amateurish mistakes and used many amateurish gimmicks (although it may fit in the movie as a light goofy lovable falang in Thailand audience members). Seriously, the Looney Toons styled red channel filter is maddening.
The protagonist is also unlikable because he is weak and blissfully oblivious (or to certain audiences a goofy kind lug). I don't know why but I also laughed at the poor dialog they gave him especially because the beginning of the film sets a different tone of the film. I'd say it led me to believe it was going to be Ryan Gosling in Drive sort of film with all the silence. Then he opens his mouth with that goofy dialog, Australian accent, and bad acting. I had to pause and laugh for like 5 minutes. I later did it twice again at some more ridiculous dialog.
Anyway, the film is weak on too many points and dead boring so, I'd pass on it entirely unless you want a timewaster