These results were pretty much expected, looking at the social metrics that this game has pre-release.
It's important to recognise 2 things.
People buy games that they are interested in or games that are able to interest them.
Based off historical precedence? We know the size of the people in the former ( people who are interested in DQ ) is a low amount outside Japan.
Based off social metrics ( trailer views, engagement on twitter, social media, etc, influencers, the wow factor that generates interest for the product outside of echo chamber )?
DQ11 failed in pretty much every respect.
A game can score amazingly well on metacritic, and it doesn't matter at all if people have already made up their mind that the game isn't in their radar.
By comparison, games like NieR Automata, Xenoblade 2 and Persona 5 had wayyyyy stronger social metrics. Those games managed to interest and engage an audience that is more than just their original IP fanbase.