Xbox suffers from the double whammy of being too new (the early 2000s stuff is just barely turning the corner into retro proper), and too western- it's not surprising to think that retro gamers who've been soaked in Japanese companies & content their whole run might have a little trouble finding their place with an American one. I certainly did- I've only had an original Xbox for about a year & a half now.
The GTA and call of duty series are japanese yea sure
Pretty much all first person shooters are US
Pretty much all games that aged badly or some that are great were made in the US especially during the ps2 era
EA currenly mainly sports formerly also very interesting platformers rpg´s etc pretty huge US company even today. Tons of ea games on sega and tons on ps1 onwards
god war etc not to mention rare wich already died but still.
For the mainstream there were plenty of non japanese games I would even say that the non japanese games dominated the markets till even today, while the japan influenced ones were the niche with pretty mediocre sales with some exceptions like final fantasy and kingdom hearts mario pokemon.
Halo was made by microsoft again not japanese very succesfull.
The xbox did pretty well back in the day it wasn´t a bust not as great as ps2 but the xbox was very expensive compared to the ps2 wich is a reason why ps2 was so succefull. I would not say that the games on ps2 would have given such high sales but rather It´s price point.
The mainstream games were just as good on xbox, niche titles would not make that big of a difference. also if am not mistaken the ps2 was cheaper than a dvd player so it was also bought just for that.
Xbox was powerfull and all but they did´t make good use of the xbox hardware, it was also pretty tough to develop games on the ps2 thanks to It´s limited power pretty much 4 times less but yet they managed to make the difference pretty minimal. Price is more powerfull than power it seems.
Xbox It´s just a console with many games that didn´t age well however back in the day such games did sell since people were especially into 3D realistic games. Shooters racing etc those are the ones that sell the best, xbox did great in that regard. However with such games usually newer means better It´s just how the world works.
also it might have 200 excusives but only a small fraction is actually good, not all exclusives can be good.