In general, this state of affairs can be considered normal for purely single-player games that rely on a story campaign, but the above-mentioned Skyrim was also such and remains very popular to this day. Obviously, something went wrong with the developers and publisher.
In fact, the reasons lie on the surface: after release, the title received mixed reviews with a considerable amount of criticism, mostly justified and constructive.
If Starfield’s peak online on Steam reached 330,273 people, now it doesn’t even reach 9,000 players. For the above-mentioned Skyrim, this figure reaches 25-30 thousand users.
It is worth noting that we are talking specifically about the PC version, distributed specifically on Steam. The situation may be different on the Xbox Series, but it’s unlikely to be radical. And even there, most of the audience did not buy Starfield, but played with a Game Pass subscription.