This was more a steam f@#ÂŁ up. They required you to vote in all categories, to vote in any. This led to many people just voting for the one they knew about or vaguely liked, in categories they weren't interested in.
It did not, you could just not select one and keep scrolling. They did however reward you with stickers for voting in each category which probably had the same result
You could definitely skip categories -- I don't have a VR headset so I didn't vote for best VR game.
I'm pretty sure a few of the wins were trolls, RDR2 won labor of love, Starfield won most innovative gameplay, Last of Us 1 won best soundtrack (this one might not be a troll, but I believe it might've been due to the godawful PC port.)