You have been spot on about everything, now, I'd like to mention something else :
Unfortunately, the absolutely shitty Americanisms and Marverl-ization have seeped into...pretty much everything nowadays - something which is to be expected since "Western" culture (American that is) is the (again, unfortunately), the status quo.
Having said that, the writing in these games have been extremely horrible due to a complete lack of nuisance due to trying to cater to the lowest common denominator (the American audience generally speaking), the lack of subtlety and cliche'-athon is just mind-boggling, I mean, you have the typical comedic relief character that speaks with a Scottish accent (Mimir-why?), one of the dwarves that speaks like a friggin' Redneck trucker (why?) Atreus which - like you said - speaks and acts like a 21st century white MURRICAN suburban kid (why?), Odin feels like a character straight out of an FX drama and as for the rest of the characters...it's all kinds of mediocre.
Listen, I'm not expecting the game to be in Archaic Greek or Norse (God forbid they actually put the work required) but...between the forced diversity, the shitty American-style® writing that has the nuance of a 10 tonne brick hitting you in the face at 120km/h...I just can't - and the worst thing is that you can't even express this kind of opinion 'cause otherwise the usual suspects will be pulling the usual "racist" and " lol, why so angry ? It's just a vidjya game/fantasy" card - and this doesn't have to do exclusively with GOW but... every piece of media that's based (loosely or not) on historic facts, foreign, non-'Murrican culture, mythology etc etc, i die a little bit inside everytime I read comments on forums/YouTube etc doing the same old song and dance - and the CONSTANT gaslighting from the directors, production companies , devs etc etc aren't making things easier...
It's basically become a case of bowing to the shitty universal Americanisms/mannerisms and having to obey to the trite, banal, cliche' modern "culture", "correctness" and "sensitivities" 'cause otherwise...
Basically, a country with a 500 year old "history" is dictating the terms of what should acceptable when it comes to everything - even to countries/people/cultures that have been around for more than 3000 years...