You are really trying to downplay the power of marketing, but you seem to realize that gets people playing. Not only that but live service design is very effective at keeping people playing even when they are not having any fun whatsoever. Because they gotta grind the battle pass and such. Extrinsic rewards and habit-forming conditioning making up for a lack of intrinsic enjoyment.
Still, I would agree with you that it's not the worst game on Steam, but like I mentioned in the other comment, that's not what steam ratings mean. It means that the vast majority people would not recommend it, and that seems pretty reasonable.
WickedFool
NotTheOnlyGamer