Unironically critiquing society's narcism while at an award show that's all about your and your friends patting each other on the back about how great you are in front of a TV audience then lecturing about how important your work is... it skews a bit pretentious.
And while I've enjoyed Stranger Things, I think he's good in it, I'd agree that it has depth and something to say, it's not exactly The 400 Blows or The Bicycle Thief. It does boil down to him waving a sword at a man holding a tennis ball on a stick pretending to be a monster.
HOWEVER; the kind of person who tunes in for Hollywood's pretentious, masterbatory, self-congratulation show and then clutches thier pearls when it's pretentious, masterbatory, and self congratulating, is a much bigger asshole than the people accepting the award.