Genshin Impact sounds like a perfectly fine game. I don't love lootboxes, but it seems strange how people love to pick on this game, and games from Ubisoft and EA which do almost the same are not so much criticized.
Ubisoft and EA are like Voldemort in this site, even saying their names is sacrilege, so I don't know, I guess you haven't been around a lot?
It also has nothing to do with being Chinese, someone mentioned they feel less comfortable knowing the company behind the level 0 trojan the game puts in your computer is Chinese, but honestly, it's just as bad as if that company was American. Nobody should be putting trojans in my computer, especially on a single-player product. And especially not to remain in my computer even after I completely uninstall the game.
So yes, lootboxes are as bad as gachas, but it is uncommon for a game that gets coverage in this site to have that kind of thing, it's more of a shooter/sport game thing. When a RPG did have lootboxes, it has been thoroughly criticised in this site and any RPG fan site that I know. Cases like Mass Effect 3 or Assassin's Creed had pages upon pages of nerdrage going on. BioWare went from the gods almighty of RPG to sellouts that sold their soul to EA. Ubisoft even had a huge thread casting them to the nine hells because some important members of their staff allegedly harassed women and had a generally mysoginist/chauvinist attitudes.
And thinking of it, at least Mass Effect 3 and Assassin's Creed Odyssey were excellent games, while Genshin Impact isn't more than a Zelda ripoff that is worse at everything Zelda does except for putting trojans in your computer and gently nudging you towards gambling with real money.
So yes, it's going to get criticism, especially because as I said, it's not even a good game. It does get good scores, because the game does have a charming early honeymoon phase, but then players sowly go into the real meat of the game, where they are offered to either infinitely grind or pay up, and realise that it's not worth their time and it's in general a very forgettable product, hence no nominations for any game of the year in any reputable site that I can tell, in a year where the quality of RPGs has been questionable at best. It just seems to be the fetish game of one particular mod that shoves Genshin Impact news about when about every real RPG fan rather forget the game even exists. This time, to showoff mobile gacha sales, no less. What else did you expect?