Does anyone pay attention to Steam awards? They're just popularity contests.
I don't know if they did it this year, but in the past they incentivized voting. So people would vote for whatever they'd heard of even if they'd never played the games.
What other kind of contest would it be? Even if you let people vote for anything (even stuff they haven't played/owned). It would probably be even more of a popularity contest if you let people do that: they'd vote for the games they believe are better based on the internet vibes, even if they have no experience with those games.
People will never be satisfied with awards. Let the community choose? You get popularity contest. Let the review outlets choose? Then you get only a certain kind of games to win the contest. Steam is very community focused in most of their recommendations and in this case, awards. This has ups and downs and sometimes its stupid. In case of RDR2 who knows what the reason was why they chose this game. It might be an attempt to troll in mass. Or a misunderstanding.
I take awards as one kind of view and never in isolation. Context matters. So I ignore those where I think it is stupid awards, like Starfield and RDR2, and look at the other candidates. And the other categories as well. And then move on with my life. Just like with the other award shows. Who cares what game won what award? It rarely impacts my choice.