Since RPGs started to get really noticed in the west as potential big sellers(with FFVII), DQ had:
Dragon Quest VII: PS1 game, came out in NA in late 2001 while looking like a mix of an SNES game with PS1 level 3d backgrounds. It just didn't have a chance.
Dragon Quest VIII: SE put actual effort in pushing the game in western market, and it actually paid off! For being the first ever DQ game to come out in EU it being one of PS2 best selling RPGs in the west is quite the achievement. Best selling DQ game in the west!
Dragon Quest IX: Came out on the DS in 2010, at the end of the DS's life, it still managed to break the 1M mark!
Dragon Quest X: an MMO RPG that SE not only never bothered to bring to the west, but went out of their way to prevent westerners from playing it!
Looking at that, the few times the series was given a fare chance in the west, it actually became a million seller, something extremely rare for JRPGs not named Final Fantasy or Pokemon. Saying "Worldwide has bad taste" isn't fair, and you should be ashamed of your words and deeds. ;p
Yeah, totally the case /s
IIRC DQ does not tend to review favorably in the west as well.
VIII and IX reviewed really well, so did the DS/3DS remakes! Where is this coming from?!