Why is this film so under rated?

As a fan of the original manga, the anime series and the animated movie its fairly clear why this film is under rated.The casting, production design, acting, fight choreography and editing to list just a few of its flaws - were totally dire.
Fair enough with the budget this film had it was never going to match the epic scope of the anime, but thats no excuse for shoddy poorly designed sets and exteriors that look like they were shot in a scrapyard.Its also no reason to piss all over the original story.Its difficult to condense years of comics into an hour and a half long film, no doubt, but the animated feature comes pretty damn close to achieving it.
The manga has an epic sense of vastness and a large dose of the fantastic - for example kenshiro can level an entire building with a single punch, or for that mattter with just his chi. He can dispatch huge enemys with the slightest brush of his hand. The enemies he fights are literaly giants among other men, and the violence is on a totally epic ott scale. The film comes nowhere near to capturing any of this. Nor could it.
I love action movies, especially martial arts movies. Even the bad ones are good for a laugh sometimes, but its difficult to laugh when hacks take such fantastic subject matter and deliver their own piss poor version which is totally disrespectfull and inferior to the source material. Im sure gary daniels is a competent martial artist (i'll get back to that) and many people here have mentioned their own martial arts training to somehow validate the fight scenes in this movie.Im not going to bother getting into a pissing contest regarding martial ability here but suffice to say, its not difficult with a bit of flexibility,and practice to deliver a measured roundhouse kick to a stopping point. Im sure there are a million orange belts in tae kwon do and Tang Soo Do classes all over the world who could do it consistently.And doing it over and over and over again in slo mo on film does not a great fight scene make. It makes for an unbelievably boring one, and one that is totally at odds with the fantasy style of the combat in the anime. The fight choreography in this film was totally flat, unimaginative and showed no real diversity of styles.To compond matters the editing of these scenes was mind numbingly bad.
Have I said enough?
It never ceases to amaze me how many people spout off about who would beat who without knowing the first thing about martial arts, combat sports or combat of any kind for that matter. So Daniels was a 3 times kickboxing champ. Really. Do a google search for world kick boxing champ and see how many names come up. A bouncer at a nightclub I frequent is a current 2x world kickboxing champ.A property developer who lives near me is a former 3x world kick boxing champ.I dont doubt the dedication and skill of many kickboxers but there are literally dozens of govering bodies and world champions at any given time at the same weight. Its a farcicall situation. And lets not even mention Muay thai. There isnt a single current world champion in westernised kickboxing who would stand a chance in thailand. Except Mohammed Samir. Who funnily is mainly a muay thai fighter too.
Fighting for the camera is and never will be anything like real combat.Never. And unless youve been in the ring or in a streetfight with the actor/martial artists your spouting about you will never know what their abilies are.
Hopefully the japanese will remake this themselves soon.With todays cg technology it would be possbile to make an accurate adaptation.look at Casshern.Fingers crossed.