Japanese market is totally different. They are into little girls with big eyes and kinda naked, not into big bad hairy orcs.
Actually there are not "many" movies like that. Define "many" and come up with actual data...Many blockbuster movies have horrible reviews and are still wildly successful at the box office.
Top 10 movies this year vs rotten tomatoes:
Captain America: Civil War - 90%
Zootopia - 98%
The Jungle Book - 94%
Batman vs Superman: Dawn of Justice - 27%
Finding Dory - 95%
Deadpool - 84%
The Mermaid - 93%
X-Men: Apocalypse - 48%
Kung Fu Panda 3 - 86%
Warcraft - 29%
So you see, the only movie with "horrible" reviews that had a high box office was a Batman/Superman movie, a combination of two 75 years old franchises, with countless fans, how the fuck can something like that can go wrong? People will go and see it regardless of what anyone says. They can put a tomato as Superman and an eggplant as Batman and call it Batman vs Superman: The Garden Wars and it will still make 800 million at box office...
Why would normal people go to see a first Warcraft movie when almost everyone says is shit, many of them on the reason that "it's not Lord of the Rings"? Also many of the Warcraft games players didn't care about it or even hated it because they got pissed by the state of WoW, Blizzard "destroyed" their beloved game, why would they put money into them? Fuck that movie lol