I know you weren't the one who made the claim, but if this is what the commenter meant by weeb culture, I'm not sure how it has anything to do with, for example, Twilight Princess.
I haven’t played TP, though I’d like to. Also I love Zelda and I don’t think the IP is “ruined” like the OP said.
BoTW has some anime influences with a feminine but gender neutral Link, animal sexualization, and a few lolis. That being said, BoTW might be my favorite game of all time.
I don't really see what you're saying re: Purah, but I'll take your word for it. Mipha and Riju are both adults, though, aren't they?
If it's just about their designs, Riju has the same basic design that Gerudo have had since Ocarina of Time, and as for Mipha, I'll just link to Princess Ruto's concept art: