Those awards are in the end all popularity contests. With enough hype and people who only played act 1 or writing fanfics about companions no one will dare to give the game a more realistic review or deny them awards because in that case the horde will descent upon them.
Just look at Eurogamer and what happened when they dared to not give a 5/5.
Yes. As much as I like this game, people confuse quality with quantity. In terms of narration, BG3 is very cartoonish and sadly not always logical even.
Still a great game, but best narrative is a bit too much.
GOTY fully deserved though.